20 POINTS Compost costs $10 per cubic yard and topsoil costs $2 per cubic yard. Maria needs more than 10 cubic feet of topsoil. She can spend no more than $50. The graph below represents the amount of each she can buy.
 Which amounts of materials satisfy the relationship?
 2 cubic yards of compost, 8 cubic yards of topsoil
 4 cubic yards of compost, 5 cubic yards of topsoil
 1 cubic yard of compost, 12 cubic yards of topsoil
 3 cubic yards of compost, 12 cubic yards of topsoil