Nicole is making tuna salad for her office colleagues. It takes of a pound of canned tuna to make 5 portions of salad. She uses pounds of canned tuna for every 2 onions used.

If Nicole uses a total of 4 onions, then how many portions of salad does she make?
A.
30 portions
B.
25 portions
C.
35 portions
D.
15 portions