Which is a solution to the following system of inequalities?
A. (6,6)
B. (7,8)
C. (8,7)
D. (9,7)

Answer: the answer is D
Step-by-step explanation: - 2 *9 + 3* 7 = 3
-5 *9 + 6 * 7 = - 3
And 3>1
-3<1