Meaning: 'Infamous' means well-known for some bad quality or deed.

Wrong options:

• carton: 'Carton' is a noun referring to a box or container, which does not fit the context of describing Ponzi's reputation.
• fiasco: 'Fiasco' is a noun that refers to a complete failure, which does not directly describe Ponzi himself but rather the outcome of his actions.
• monthly interest rate: 'Monthly interest rate' is a noun phrase that refers to a specific financial term, which does not fit as a descriptor for Ponzi.
• payment: 'Payment' is a noun that refers to the act of paying, which does not describe Ponzi's character or reputation.

Correct answer: postage

Explanation: The term 'postage' refers to the fee paid for sending mail, which is relevant to Ponzi's original scheme involving international reply coupons. It fits grammatically as a noun that serves as the object of the preposition 'of.'

Meaning: 'Postage' refers to the cost associated with sending letters or packages through the mail.

Wrong options:

• carton: 'Carton' is a noun that does not relate to the context of mail or stamps.
• fiasco: 'Fiasco' is a noun that describes a failure, which does not fit the context of discussing stamps.
• monthly interest rate: 'Monthly interest rate' is a financial term that does not relate to the context of postage or stamps.
• payment: 'Payment' is a noun that refers to the act of paying, which does not fit the context of stamps.

Correct answer: payments

Explanation: The word 'payments' is a noun that refers to the amounts of money given to someone, which fits the context of Ponzi diverting funds to earlier investors. It aligns grammatically as the object of the verb 'make.'

Meaning: 'Payments' refers to the amounts of money that are paid to someone.

Wrong options:

• carton: 'Carton' is a noun that does not relate to the context of financial transactions or money.
• fiasco: 'Fiasco' is a noun that describes a failure, which does not fit the context of making financial transactions.
• monthly interest rate: 'Monthly interest rate' is a specific financial term that does not fit the context of general payments.
• interest: 'Interest' is a noun that refers to the cost of borrowing money, which does not fit as a direct object in this context.

Correct answer: interest

Explanation: The word 'interest' is a noun that refers to the money paid regularly at a particular rate for the use of borrowed money, which fits the context of payments made to investors. It aligns grammatically as the object of the preposition 'as.'

Meaning: 'Interest' refers to the cost of borrowing money, typically expressed as a percentage of the amount borrowed.

Wrong options:

• carton: 'Carton' is a noun that does not relate to financial terms or payments.
• fiasco: 'Fiasco' is a noun that describes a failure, which does not fit the context of financial transactions.
• monthly interest rate: 'Monthly interest rate' is a specific financial term that does not fit as a general term for what Ponzi was paying.
• payment: 'Payment' is a noun that refers to the act of paying, which does not fit in the context of describing the nature of the payments made.