The answer you're looking for <u><em>D. Definition clue</em></u>. This is the correct answer because in the provided sentence we read "People who are gregarious, or very friendly and sociable, always have something fun to do. " Gregarious is what we are defining, and right after the word we find "or very friendly and sociable" which explains what gregarious means.
<em>Sorry if i'm late, I got to this question as fast as I could! That's the best explanation for this answer I have to offer, but hopefully it explains why I chose that answer. Have a great day! </em>
This is because in the statement it is giving you the answer by saying, "or very friendly and sociable." So it gives us the defintion of the word in the statement.