Answer:
Neither A not B. It's C
Step-by-step explanation:
You'll have to visualize it.
Think about this as a cake on a table.
You want to eat the top — so you slice across horizontally.
When you have just the bottom left on the table, you will have a rectangle shape
Another hint is that the question says a "right rectangular pyramid". So no matter how you slice a pyramid, the bottom of each slice will look the same as the name. In this case "rectangular"
PS: I've attached a sketch of what it looks like before & after slicing.
