Which explanation best describes how to solve this problem?

Cindy rode her bike for 10 miles, ran for twice as many miles as she rode her bike, and swam for 2 miles.

How many miles did Cindy cover altogether?

A.
Divide 10 by 2. Then add 2 and 10 to the quotient.

B.
Add 10 and 2 and multiply the sum by 2.

C.
Add 10 and 2 and 10 and 2.

D.
Multiply 10 × 2. Then add 10 and 2 to the product.