Which of the Following Correctly Describes What Happens in the First

Which of the following correctly describes what happens in the first stage of the Q cycle, considering that one cytochrome c is reduced in the process?

A) one QH₂ is oxidized to QH $\bullet$ while another Q $\bullet$ is reduced to QH₂
B) one QH₂ is reduced to QH $\bullet$ while another QH $\bullet$ is oxidized to Q
C) one QH₂ is oxidized to QH $\bullet$
D) one QH₂ is oxidized to Q while another Q is reduced to QH $\bullet$
E) none of the above