I dont really know how to do this and its due today, please help

Answer:
I THINK it is A
Step-by-step explanation:
I did this question before
Answer:
(x + 3) + (x + 3) + (x + 3) + (x + 3)
Step-by-step explanation:
Repeated addition:
4(x + 3), means that (x + 3) is added by itself 4 times.
So:
(x + 3) + (x + 3) + (x + 3) + (x + 3)