In which sentence is the singular possessive of lobster formed correctly?

A.
That lobster's claws were sharp and powerful.

B.
That lobsters's claws were sharp and powerful.

C.
That lobsters' claws were sharp and powerful.

D.
That lobsters claws were sharp and powerful.

Question

In which sentence is the singular possessive of lobster formed correctly?
 
 A.
That lobster's claws were sharp and powerful.
 
 B.
That lobsters's claws were sharp and powerful.
 
 C.
That lobsters' claws were sharp and powerful.
 
 D.
That lobsters claws were sharp and powerful.

anonymous · Answer

lol does anyone know the answer, im stuck with it too