Question

what does the idiom in this text suggest?cell phones once cost an arm and a leg, but today the majority of people can afford them.cell phones once varied greatly in price.cell phones were once very expensive.

Explanation:

The idiom "cost an arm and a leg" means something is very expensive. In the context of the sentence, it is used to describe the past cost of cell phones. The second option correctly interprets the idiom. The first option about price variation is not related to the meaning of the idiom.

Answer:

Cell phones were once very expensive.