If a firm decides to eliminate a product line that produces a yearly net loss of $21,000, its yearly net income

A. will increase by $21,000 only if it can eliminate all of the fixed costs associated with that product line.

B. will increase by $21,000 only if it can eliminate all of the variable costs associated with that product line.

C. will automatically increase by $21,000.

D. will decrease unless the firm can eliminate all of the fixed costs associated with that product line.