HELPPPP :(( pleaaaase I’ve been stuck on this for a while. I’m kinda slow lol

Answer:
A. 7
Step-by-step explanation:
Since we see that F(x) = x+2, we can solve it without even looking at other values. Input means x, so we simply just plug in 5 into F(x). 5+2 = 7, therefore it is A. 7.