PLEASE HELP!!!!!!

Read the sentence.

They wandered over the hill and around the block before they came home.

How should the sentence be punctuated to omit the phrase "over the hill and around the block"?

A. They wandered, before they came home.

B. They wandered—before they came home.

C. They wandered . . . before they came home.

D. They wandered; before they came home.