Which sentence has the correct punctuation mark?

Correct option is A

The correct answer is (a) You studied (all day) for the grammar test.

Correct Use of Parentheses:
Parentheses are used to provide additional or explanatory information that is not essential to the main sentence but adds context.

• In option (a), "all day" is correctly written as two separate words within the parentheses, which is grammatically correct.

Example:

• She waited (patiently) for the bus.

Additional Information:

1. You studied (all-day) for the grammar test.

   • Incorrect because "all-day" is hyphenated, which is unnecessary here since "all day" is not functioning as a compound adjective.

2. You studied (allday) for the grammar test.

   • Incorrect because "allday" is not a valid English word.