Question

what is unique about a primary battery? it can only be used once. it can be charged. it can be used more than once.

Explanation:

Primary batteries are non - rechargeable. This means they cannot be charged, and they are designed to be used until their chemical energy is exhausted, so they can only be used once. The option "It can be charged" is incorrect as primary batteries can't be charged. The option "It can be used more than once" is also incorrect because primary batteries are single - use.

Answer:

A. It can only be used once.