Sentence Correction (SC) | Re: In 1800, nearly 25 years after

In 1800, nearly 25 years afterhis discovering of methane gas, Alessandro Volta, the Italian physicist, had developed what would become known as the voltaic pile, the first electric battery.

A)his discovering of methane gas, Alessandro Volta, the Italian physicist, had developed what would become known as the voltaic pile, the first electric battery

B)his having discovered methane gas, Alessandro Volta, the Italian physicist, developed the first electric battery, which will later become known