As given by the question
There are given that the equation:
Now,
A vertical line has an undefined slope, and its equation is x = 8 because no matter what y is, x will always be 8.
But, you need it standard form Ax+By=C,
So, it written as: x + 0y = 8
Then,
The value of A is 1, B is 0 and C is 8
Hence, the correct option is B.