help please!

Determine a value of the constant a for which lim g(x) exists and state the value of the limit, if possible X- -1 x2 - 6x ifxs - 1 g(x) = ax" - 3 ifx > - 1 Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice O A. The limit exists for a = . With that value for a, lim g(x) = X- -1 O B. There is no value of a for which lim g(x) exists. X- -1