Meaning: 'Enacted' means to make a law or to put something into effect, indicating that the Poor Law was officially established by the government.

Wrong options:

• resent: 'Resent' means to feel bitterness or indignation at having been treated unfairly, which does not fit the context of establishing a law.
• rejected: 'Rejected' implies that something was dismissed or not accepted, which contradicts the idea of passing a law.
• enlightened: 'Enlightened' refers to having gained knowledge or understanding, which does not convey the action of creating a law.

Correct answer: regulated

Explanation: The word 'regulated' is appropriate as it indicates that the social insurance for the aged was controlled or governed by statistical evaluations. This fits grammatically and contextually, as it describes how the program was managed.

Meaning: 'Regulated' means to control or supervise by means of rules or regulations, indicating that the implementation of social insurance was structured and monitored.

Wrong options:

• speculate: 'Speculate' means to form a theory or conjecture without firm evidence, which does not fit the context of managing a program.
• proliferate: 'Proliferate' means to increase rapidly in numbers, which does not relate to the management or oversight of a program.
• articulate: 'Articulate' means to express an idea or feeling fluently and coherently, which does not align with the context of regulation.

Correct answer: institute

Explanation: The word 'institute' is the correct choice as it means to establish or set up, which fits the context of the United States creating programs for the elderly. It is grammatically correct and logically follows the historical narrative.

Meaning: 'Institute' means to establish something, especially a program or policy, indicating that the U.S. began to create such programs for the elderly.

Wrong options:

• restitute: 'Restitute' means to restore something to its original state, which does not fit the context of establishing new programs.
• destitute: 'Destitute' refers to being extremely poor and lacking basic necessities, which is unrelated to the action of creating programs.
• substitute: 'Substitute' means to replace one thing with another, which does not convey the idea of establishing new programs.

Correct answer: alleviating

Explanation: The word 'alleviating' fits well as it means to make something less severe or serious, which aligns with the context of state programs helping to ease some burdens of aging. It is grammatically correct and contextually appropriate.

Meaning: 'Alleviating' means to reduce or lessen the severity of something, indicating that these programs help to lessen the difficulties faced by the elderly.

Wrong options:

• contaminating: 'Contaminating' means to make something impure or harmful, which does not fit the positive context of helping the elderly.
• quintuplicating: 'Quintuplicating' means to increase fivefold, which is irrelevant to the context of reducing burdens.
• consolidating: 'Consolidating' means to make something physically stronger or more solid, which does not convey the idea of easing burdens.