pls help me answer this

Answer:
C
Step-by-step explanation:
The answer for A:
-10 = 10 (no solution) -10 does not equal 10
The answer for B:
x = 1
The answer for C:
-10 = - 10 (if x = any number, then -10 would still equal -10, so, it would be infinitely many solutions
The answer for D:
x = 0
So, the answer would be C as it's the only one with infinitely many solutions. Hope this helps.