Question

what is leisure? it would likely surprise modern readers if he or she were told that the meaning of life is leisure. this seems to be the same thing as saying that the meaning of life is nothing more than relaxing by the side of the pool. one can imagine almost anyone thinking to himself, what a preposterous idea. this idea is not as foreign as it might appear at first glance. indeed, it could be considered the classic western position about the very meaning of life. how should the underlined selection be changed? what a preposterous idea! no change what a preposterous idea? what a preposterous idea! what, a preposterous idea?

Explanation:

The original "What a preposterous idea." is a statement expressing strong disbelief. It should be an exclamation to convey the shock better. Also, the first - letter capitalization in the original is correct for a complete sentence.

Answer:

A. What a preposterous idea!