What Condition Must Be Met for a Battery to Be

Multiple Choice

What condition must be met for a battery to be rechargeable?

A) Either its anode or its cathode must generate a gas as a result of the electrochemical reaction.
B) It must generate electricity via an acid-base reaction rather than via an oxidation-reduction reaction.
C) The battery must be open to the outside so that it can vent any internal pressure that builds up from gases within it.
D) The electrochemical reaction of the battery must be reversible.