Susan makes $5 per hour babysitting and $7 per hour as a lifeguard. Her goal is to make at least $140. Let x=
the number of hours that Susan babysits. Let y = the number of hours that Susan works as a lifeguard. Which of
the following represents three possible solutions to the problem?
A) (x, y) = (20, 0), (0, 20), (10, 10)
B) (x, y) = (15, 13), (16, 12), (17, 11)
C) (x, y) = (14, 12), (13, 11), (12, 10)
D) (x, y) = (14, 11), (15, 10), (16, 9)