What creates an electric current in a battery? A. Atoms dissolving
B. Metals generating
C. Electrons jumping
D. Liquids moving ​

There's a separate chemical reaction happening at the positive electrode, where incoming electrons recombine with ions taken out of the electrolyte, so completing the circuit. The electrons and ions flow because of the chemical reactions happening inside the battery—usually two of them going on simultaneously.

Explanation:

option (B) is right