Which sentence contains a punctuation error?

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

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

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

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

Question

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

anonymous · Answer

C because one third needs to be hyphenated (one-third)

anonymous · Answer

hmm i think B. because it should be half-cup not one-half cup. The measurement is half-cup, not one-half. In C its not a measurement, and doesn't need to be hyphenated

anonymous · Answer

http://forum.wordreference.com/showthread.php?t=205215

anonymous · Answer

It's B. I think.