Which Statement Describes Shared Characteristics of Both Oxidative Phosphorylation and Photophosphorylation

Which statement describes shared characteristics of both oxidative phosphorylation and photophosphorylation?

A) During electron transport, protons are exported across the outer membrane.
B) ATP synthesis occurs in conjunction with proton translocation.
C) Electron transport proceeds from compounds with lower reduction potentials than those with higher reduction potentials.
D) ATP synthesis occurs in conjunction with proton translocation, and electron transport proceeds from compounds with lower reduction potentials than those with higher reduction potentials.
E) None of these statements describes shared characteristics of both oxidative phosphorylation and photophosphorylation.