The graph of the rational function f left parenthesis x right parenthesis equals fraction numerator x minus 2 over denominator x squared plus 4 x minus 5 end fraction will have a vertical asymptote at _________. a.) x equals short dash 5 and x equals 2 b.) x equals 1 and x equals 2 c.) x equals short dash 5, x equals 1, and x equals 2 d.) x equals 1 and x equals short dash 5