Meaning: 'Invaded' means to enter a place forcefully and with intent to conquer or occupy, which accurately describes the Roman Army's action in Britain.

Wrong options:

• purported: 'Purported' means claimed or alleged, which does not fit the context of a military action and is not in the correct tense for this historical reference.
• pursued: 'Pursued' implies chasing or following, which does not accurately describe the action of the Roman Army in this context, as they were not following but rather entering the territory.
• enlightened: 'Enlightened' refers to gaining knowledge or understanding, which is unrelated to the military context of the sentence and does not fit grammatically.

Correct answer: shifted

Explanation: The verb 'shifted' is in the past tense and indicates a change in the traditional communal form of life, which is consistent with the historical context of the sentence. It fits grammatically and contextually as it describes a transition that occurred during the first century BC.

Meaning: 'Shifted' means to change or move from one state to another, indicating a transformation in the way of life in Britain during that period.

Wrong options:

• withdrew: 'Withdrew' suggests a retreat or pulling back, which does not convey the idea of change in the communal form of life and is not contextually appropriate.
• shaped: 'Shaped' implies forming or molding, which does not accurately represent the idea of a transition or change in lifestyle, making it contextually incorrect.
• awarded: 'Awarded' means to give something as a prize or honor, which is irrelevant in this context and does not fit grammatically.

Correct answer: to

Explanation: The preposition 'to' indicates direction or movement towards a new state or condition, which is necessary for the sentence to convey the transition to a new world. It fits grammatically and contextually as it connects the action of shifting to the new state described.

Meaning: 'To' is a preposition used to indicate direction or destination, in this case, pointing towards the new world that individuals were becoming more important in.

Wrong options:

• at: 'At' indicates a specific location or point in time, which does not convey the sense of movement or transition required in this context.
• in: 'In' suggests being inside a place or condition, which does not accurately reflect the idea of moving towards a new world, making it contextually inappropriate.
• or: 'Or' is a conjunction used to present alternatives, which does not fit the grammatical structure needed here.

Correct answer: became

Explanation: The verb 'became' is in the past tense, which is necessary to maintain consistency with the historical narrative of the sentence. It indicates a completed action that aligns with the context of individuals gaining importance during the transition period.

Meaning: 'Became' means to come into being or to undergo a change in status, indicating that certain individuals gained more importance during this time.

Wrong options:

• having become: 'Having become' is a perfect participle that suggests a prior action, which does not fit the simple past narrative of this sentence.
• become: 'Become' is in the present tense, which does not match the past context of the sentence and is grammatically incorrect here.
• becoming: 'Becoming' is a gerund or present participle, which does not fit the past tense structure required in this context.