The answer is A. Quieren. Thats because its referring to "you guys"
It's correct.
Estoy comiendo una manzana.
I'm eating an apple.
Hope it helps
If u wanted to have many answer would pick A, C, D. but If u wanted just one, it would be C.
The sentence would change because it is no longer a question it is a statement. and the indirect object pronoun would me "you". because the question is asking "who do you give flowers to?"