Sam's Fruit Cellar earns a $0.40 profit for each apple that it sells and a $0.40 profit for each banana that it sells. Which expression shows Sam's total profits from selling apples (a) and bananas (b)?

O A. 0.40(ab)
© B. 0.40(a + b)
O C. 0.40 + a + 0.40 + b
• D. 0.80(ab)