Use L'Hospital's Rule if applicable to find the limit$.$

$\underset{x1}{lim}\frac{x^9+2x^7+6x^5-9}{x-1}$

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A$.\underset{x1}{lim}\frac{x^9+2x^7+6x^5-9}{x-1}=($Simplify your answer.$)$

B$.$ The limit does not exist and does not equal $$ or $-.$