Caleb wants to find 15 × 4. Which steps show a method for solving this problem?
A. 15 × 4 = 4 × 15 = (4 ×1) + (4 × 5)
B. 15 × 4 = 4 × 15 = (4 +1) × (4 + 5)
C. 15 × 4 = (10 +5) × 4= (10 +4) × (5 + 4)
D. 15 × 4 = (10 + 5) × 4 = (10 × 4) + (5 × 4)