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.
MAKE SURE YOUR ANSWER IS 1000000000% CORRECT....THIS IS GRADED.
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.
MAKE SURE YOUR ANSWER IS 1000000000% CORRECT....THIS IS GRADED.