If a Thylakoid Is Placed in a Basic Solution ATP

If a thylakoid is placed in a basic solution ATP synthesis will occur.How is this possible?

A) An electron gradient is created by the difference in pH.
B) A proton gradient is created by the difference in pH.
C) ATP is formed spontaneously at low pH.
D) ATP cannot be broken down at low pH.
E) The carbon reactions are blocked in the thylakoid at high pH.