Correct Answer: Copious

Solution : The correct answer is the second option, copious.

In the given word pair, "restricted" means limited or confined, indicating a lack of freedom or abundance. On the other hand, "copious" stands in opposition, representing abundance and a large quantity without constraints.

The meanings of the other options are as follows:

Circumscribed: This word also means limited or confined, similar to "restricted."

Capped: While it denotes a limit, it doesn't convey a sense of abundance or generosity.

Finite: This term is synonymous with limited, having bounds or restrictions.

Therefore, the correct answer is copious.