Which sentence uses punctuation correctly?

A.
The discovery which was the first of its kind, in several years, caused an international stir.

B.
The discovery, which was the first of its kind in several years, caused an international stir.

C.
The discovery, which was the first of its kind in several years caused an international stir.

D.
The discovery which was the first of its kind in several years, caused an international stir.

Question

Which sentence uses punctuation correctly?	
 
 A.
The discovery which was the first of its kind, in several years, caused an international stir.
 
 B.
The discovery, which was the first of its kind in several years, caused an international stir.
 
 C.
The discovery, which was the first of its kind in several years caused an international stir.
 
 D.
The discovery which was the first of its kind in several years, caused an international stir.

anonymous · Answer

I think it is B(: but not 100% sure

linn99123 · Answer

@csimmons01

anonymous · Answer

It's B, since the part 'which was the first of its kind in several years' can be removed without affecting the sentence.

linn99123 · Answer

i have a few more :o

anonymous · Answer

Sure, I'd be glad to help if I can :)