Answer: C
Explanation:
Since this is a matter of knowing the language to the answers, I'll just go ahead and write what each of these answers would translate to.
A) 23-8= x
B) 8-x= 23 or below
C) x-8 < 23
D) 8-x > 23
So, the answer to this question is C, a number decreased by 8 is less than 23.