Solve the Problem $\mathrm{E}_{1}, \mathrm{E}_{2}, \mathrm{E}_{3}$ , And $\mathrm{E}_{4}--$ In the Amounts (In Milligrams) Shown in the Table

Solve the problem.
-An agricultural research scientist is developing three new crop growth supplements -- A, B, and C. Each pound of each supplement contains four enzymes -- $\mathrm{E}_{1}, \mathrm{E}_{2}, \mathrm{E}_{3}$ , and $\mathrm{E}_{4}--$ in the amounts (in milligrams) shown in the table.

The cost of $\mathrm{E}_{1}$ is $\$ 20 / \mathrm{mg}$ , the cost of $\mathrm{E}_{2}$ is $\$ 40 / \mathrm{mg}$ , the cost of $\mathrm{E}_{3}$ is $\$ 10 / \mathrm{mg}$ , and the cost of $\mathrm{E}_{4}$ is also $\$ 10 / \mathrm{mg}$ . The growth benefit for crops is expected to be proportional to 10 times the amount of $A$ used, 25 times the amount of $B$ used, and 60 times the amount of $C$ used. However, the total cost of the enzymes used in $A, B$ , and $C$ must be less than $\$ 5000$ for each treatment. How many pounds each of $A, B$ , and $C$ should be produced to maximize the growth effect?

A) $0,9.3,10.0$
B) $0,0,15$
C) $3.0,3.0,4.0$
D) $9.0,0,9.5$