A. Because grapes and pumpkins grow on vines so they work together. With B., it's either your parents OR your grandparents, not both, therefore they are not working together. For C., Steve and Thuan love professional basketball, but love is a noun. There is no verb in D., so the answer is A.
Maybe the last one, but like I’m not 100%
The reason I think the last one is bc it gives more positive information about her. 1 and 3 give no information about her, 2 gives negative information, but 1 gives more positive information describing her personality.