help plz. Which explanation best describes how to solve this problem?


Jan walked 4 kilometers, skated 3 times as many kilometers as she walked, and swam 1 kilometer.
How many kilometers did Jan cover altogether
a Multiply 3 × 4. Add 1 to the product.


b Subtract 1 from 4. Then multiply the difference by 3.


c Add 1 and 4. Add that sum to the product of 4 × 3.


d Divide 4 by 1. Then add 3 and 4 to the quotient.