Answer:
(B) It decreases
Explanation:
I figured this out with basic logic, but we can use proof to find it out.
If we have
, we can assume that k is around 10.
So
.
Now let's decrease k by 1, making k=9.
We can see that the value is decreasing, but let's try one more.
Let's make k=8.
So we can see the general pattern here is that it's decreasing.
Hope this helped!