Sam is out to dinner with his friends. He just made a big bonus at work, and treats himself with a $30 steak plate. Everyone else has a ticket of about $15, except for Tim, who is on a tight budget and pays $10 for his meal. The waiter brings only one check to the table. What is the best way for the group to split the ticket?

a. Power Method
b. Responsibility Method
c. Equality Method
d. Equity Method

d. Equity Method