Ring, Incorporated's income statement for the most recent month is given below.

If sales in Store Q increase by $30,000 as a result of a $7,000 increase in traceable fixed costs: A. Store Q's contribution margin should increase by $18,000 B. Store Q's segment margin should increase by $12,000 C. Store Q's contribution margin should increase by $11,000 D. Store Q's segment margin should increase by $5,000