Which sentence shows the correct use of a common homophone?

a. they’re still not finished with the project that was due yesterday.
b. their are a number of great books about the civil war in the library.
c. they said they would put away all of there clean clothes before school.
d. i think i saw an entire flock of wild parrots sitting in the trees over their.

The correct answer is A. They’re still not finished with the project that was due yesterday.

A homophone refers to two or more words that have the same pronunciation, but are spelled differently and have different meanings and uses in language. "They", "their" and "they're" are homophones because they all sound the same, but mean different things and have different uses. Option A. is the only sentence in which the homophone is correctly used. 

A. They’re still not finished with the project that was due yesterday.

Explanation:

Visual support helps the audience understand the speech’s main points.

Explanation:

I’m not entirely sure, but I believe that‘s the right answer.