G6A01:What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G6A01 is 10.5 volts.
The key fact is 10.5 volts. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.