When is it permissible to exercise European-style options contracts?

Step by Step Explanation:

European-Style Options: Can only be exercised on their expiration date, unlike American-style options, which can be exercised any time before expiration.

Incorrect Options:

A: Not accurate; the exercise must occur specifically on the expiration date.

C: Options cannot be exercised after expiration.

D: The expiration date depends on the option contract, not a specific weekday.