Answer:
Volume = 5 * 3 * 3
= 45
Hope this helps :)
Also it would be the 2nd option in your case.
Explanation:
Finding the volume of an object, so for example you have here is a rectangular prism, you would multiply Length times height times Width.
Which is also this equation:
Volume = L * W * H
L = Length
W = Width
H = Height