I'm not sure if A B C D are answers, but I can say for sure that C is positive and A, B, and D are negative.
A:
Since there is only one -1, the expression is negative;
B:
Here as well, there is only one -1, so the expression is negative;
C:
The -1 cancels out;
D:
Here, you can't cancel the -1 out, so it remains negative;
Sorry for the delay, hope this helps :)
A:
Since there is only one -1, the expression is negative;
B:
Here as well, there is only one -1, so the expression is negative;
C:
The -1 cancels out;
D:
Here, you can't cancel the -1 out, so it remains negative;
Sorry for the delay, hope this helps :)