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 were once popular items to trade. cell phones were once very expensive.

Explanation:

The idiom "cost an arm and a leg" is a common English expression that means something is extremely expensive. The text contrasts this past high cost with the present affordability of cell phones, so the idiom refers to the former high price of cell phones.

Answer:

Cell phones were once very expensive.