Local businesses, for example, can provide gift cards, movie tickets, and discount coupons to be distributed to students who take part in the voluntary tutorials. By sweetening the pot in this way, more students will be enticed to stay after school and participate.
What does the author mean by sweetening the pot?

A) making the classes easier for students to attend
Eliminate
B) making the classes more attractive to students
C) making the classes at a more convenient time
D) making the classes free to students