Suppose a Plant Is Exposed to a Toxin That Causes

Suppose a plant is exposed to a toxin that causes the thylakoid membranes to become much more permeable to protons than normal. Which of the following would be TRUE?

A) The carboxylation step of the Calvin cycle would be unaffected.
B) The reduction step of the Calvin cycle would slow down and eventually stop.
C) The regeneration step of the Calvin cycle would slow down and eventually stop.
D) The reduction and regeneration steps of the Calvin cycle would slow down and eventually stop.
E) The carboxylation and reduction steps of the Calvin cycle would slow down and eventually stop.