13. Cianna saw the flyer to the right for an anime club membership. Cianna wants to calculate the cost for a membership, including the one-time fee and possible lengths of time she may use it. She found a coupon for 20% off the total cost. Cianna wrote the expression below to find the new amount with the discount, where m represents the number of months.
Select the part of Cianna’s expression that has a mistake.

0.2 ( 25 + 10m)

To make the expression correct, what value should replace the mistake?

-0.2 B) 0.8 C) -0.8 D) 1