Answer:
D) 48
Explanation:
We can see there are two layers, each with an equal number of cubes. So then, we can count the top layer. It is visible that there are 24 cubes in the top layer, but the second layer isn't visible. But, if we know the layers are equal, then the bottom layer will also have 24 cubes. 24+24=48, so the rectangular prism contains 48 cubes.