In a litigation process, the party who files a complaint is called the ________

Total variable costs change in direct proportion to changes in the volume of production

Indicate whether the statement is true or false

Vanish has a $1.00-off coupon attached to the container that can be easily removed, which is an example of a(n):

A) instant-redemption coupon B) bounce-back coupon C) cross-ruffing coupon D) response-offer coupon