Top, D
Front, A
Side, B
1) Looking at that figure, we can state that:
Top:
Note that this a 2 Dimensional representation, so the top view of this object is the shape D
Front
Looking to the front of that shape we can see that the shape that fits this 2D representation is A
Side
And finally, the side views of this object has to have a height of two squares, so the side view is given in B
And that is the answer