Which of the Following Would Decrease the Activity of RuBP

Which of the following would decrease the activity of RuBP carboxylase?
(I) a change in the pH of the stroma from 6.7 to 7.9
(II) an increase in the concentration of Mn²⁺ in the stroma
(III) an uncoupling protein embedded in the thylakoid membrane
(IV) presence of the transition state analog CA1P

A) I,II,III,IV
B) I,III,IV
C) II,III,IV
D) III,IV
E) I,III