Carl wants to find the product 30 × 5 6. Which of the following best explains how he can find the product mentally? A. He knows that 30 ÷ 5 is 6. He then multiplies 6 by 6 to get 36. B. He knows that 30 × 6 6 is 30. He then subtracts 1 from 30 to get 29. C. He knows that 3 × 6 = 18. He then adds 18 and 5 to get 23. D. He knows that 30 × 1 6 is 5. He then multiplies 5 by 5 to get 25.