Which sentence does not contain any errors?

A.
I cannot remember whether my fathers' grandmother was ever allowed to vote.

B.
Their's one exception to this law, however, regarding repeat offenders.

C.
As you can see, the red ticket is mine and the green ticket is your's.

D.
Each voter's ballot was placed in a sealed box.

Question

Which sentence does not contain any errors?
 
 A.
I cannot remember whether my fathers' grandmother was ever allowed to vote.
 
 B.
Their's one exception to this law, however, regarding repeat offenders.
 
 C.
As you can see, the red ticket is mine and the green ticket is your's.
 
 D.
Each voter's ballot was placed in a sealed box.

anonymous · Answer

A is wrong because it should be "Father's"
B is wrong because it should be "There's" 
C is wrong because it should be "Yours"

anonymous · Answer

D!