Which sentence contains a punctuation error?

A.
It is a well known fact that the earth revolves around the sun.

B.
It will be chilly later, so bring your blue-green sweater.

C.
We used one-half cup of chopped onions in the recipe.

D.
About one third of my friends have pet dogs.

Question

Which sentence contains a punctuation error?	
 
 A.
It is a well known fact that the earth revolves around the sun.
 
 B.
It will be chilly later, so bring your blue-green sweater.
 
 C.
We used one-half cup of chopped onions in the recipe.
 
 D.
About one third of my friends have pet dogs.

supercalifragalisticexspeaalli · Answer

what do u think

errinss · Answer

i think its D because its not hyphenating the fraction