Currently, there are 68 of a certain endangered species in captivity. Zoologists hope to breed 5 more of the species annually. If x represents the number of years of breeding, which of the following equations could be used to find y, the total number of the species in captivity?
A.68y = 5x
B. y = 5x + 68
c.y = 73x
d y + 68 = 5x