Which sentence contains an incorrect possessive form?

A.
My dog always wears its collar.

B.
Nobody's dish for the potluck dinner contains meat.

C.
Ours' is surely the most colorful float in the parade.

D.
Have you collected everyone's tickets yet?

Question

Which sentence contains an incorrect possessive form?	
 
 A.
My dog always wears its collar.
 
 B.
Nobody's dish for the potluck dinner contains meat.
 
 C.
Ours' is surely the most colorful float in the parade.
 
 D.
Have you collected everyone's tickets yet?

conqueror · Answer

I would say C

Ours is is surely the most colorful float in the parade doesn't make any sense.

anonymous · Answer

I am pretty sure that it is A

conqueror · Answer

Yeah...I know both A and C seem to be wrong

anonymous · Answer

that is an iffy