Answer:
Agree with Shawn.
Explanation:
If you have a cube or a rectangle prism, and you double its dimensions you are left with a box that is 8 times as big as the first one, as we are talking about volume and volume is elevating things to the cube. In order to double the volume, you just need to double one of its dimensions, and you will get double the volume in the box, for example, double its height, or the length.