I would say B is the best choice.
Answer:

Step-by-step explanation:
Use synthetic division:
-6 | 2 8 -25 -6 14
<u>____-12_24_ 6_ 0</u>
2 -4 -1 0 | 14
-6 comes from x+6=0 where x=-6
We drop the first number 2 and multiply it by -6. We then combine 8 and -12 to get -4. We repeat this process until the last column. The answer will be in coefficients with a remainder if there is one.
Therefore, the correct answer is
.
Its one solution because it is 1