Mary is selling her craft to earn money she sells her bracelets for $6 and her necklaces for $10 her goal is to make at least $120 in sales which of the following represents three possible solutions to the problem

a. 6x+10y<120
(5,10),(10,5),and(15,0)are three possible solutions.

b.6x+10y>=120
(5,9),(10,6),and(15,3)are three possible solutions.***

c. 6x-10y<120
(5,5),(10,10),and(15,15)are three possible solutions.***

d. 7x+5y<=140
(7,21),(14,14),and(21,7)are three possible solutions.