Which sentence shows the correct use of commas?

A.
When I went to the mall, Jane was working in the food court.
B.
When I went, to the mall, Jane was working in the food court.
C.
When I went to the mall Jane was working, in the food court.
D.
When, I went to the mall, Jane was working, in the food court.

A. When I went to the mall, Jane was working in the food court.