【单选题】

The auxiliary battery and auxiliary battery charger connects in parallel with the main battery during non-normal conditions to help supply power.

A、The auxiliary battery and auxiliary battery charger and the main battery connect together during non-normal conditions to help supply power.
B、In normal conditions,the auxiliary battery and auxiliary battery charger should be disconnecteD.
C、In non-normal conditions,the auxiliary battery and auxiliary battry charger should be disconnecteD.