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.

rawfeeds- · Answer

@King.Void.

mysticfury · Answer

the correct answer is A , since "which was the first of its kind in several years" is an appositive and appositives need to be enclosed in commas

rawfeeds- · Answer

what you think @King.Void. i think b

king.void. · Answer

@MysticFury  is correct.