Carla bought 66 inches of pink ribbon and 36 inches of white ribbon. She wanted to cut each ribbon into 6 equal pieces.

Which explanation correctly shows how to calculate the difference in length between one piece of pink ribbon and one piece of white ribbon?

A.
Step 1 Divide: 66 ÷ 6.

Step 2 Divide: 36 ÷ 6.

Step 3 Subtract the two quotients.

B.
Step 1 Divide: 66 ÷ 6.

Step 2 Divide: 36 ÷ 6.

Step 3 Add the two quotients.

C.
Step 1 Multiply: 66 × 6.

Step 2 Multiply: 36 × 6.

Step 3 Add the two products.

D.
Step 1 Multiply: 66 × 6.

Step 2 Multiply: 36 × 6.

Step 3 Subtract the two products.