Option A is correct
value of x will cause the denominator of
to be 0
To find value of x that make the denominator 0,
We set denominator =0 and solve for x
5x + 1 =0
Subtract 1 from both sides
5x + 1 - 1 = 0 - 1
5x = -1
Divide by 5 on both sides

So

Option A is correct