Three students are comparing the winners’ cash prizes at different video game tournaments. Tournament A offers a prize that is $5000 more than tournament B, and tournament C offers a prize that is $2000 more than tournament A. Which equation best represents the relationship between the winners’ cash prizes at tournaments A, B, and C?

a. A = B + 5

b. C = A + 2

c. C = B + 7

d. C = B – 7