The initial substitution of \(x = a\) yields the form \(\frac{0}{0}\). Simplify the function algebraically, or use a table or graph to determine the limit. If necessary, state that the limit does not exist.
\(\lim_{x \to 18} \frac{x^2 + 3x - 378}{x^2 - 324}\)
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. \(\lim_{x \to 18} \frac{x^2 + 3x - 378}{x^2 - 324} = \) \(\Box\) (Type an integer or a simplified fraction.)
B. The limit does not exist.