The Presence of 10 Copies of the C Subunit of the F₀

The presence of 10 copies of the c subunit of the F₀ complex of yeast ATP synthase allows for the synthesis of 1 ATP for every ______ proton(s) that are translocated across the inner mitochondrial membrane.

A) 10
B) 4
C) 3.3
D) 2.5
E) 1