Final answer:
Without the actual rational expression, it is impossible to determine the vertical asymptote among the provided options, as a vertical asymptote is found by identifying where the denominator of the rational function is zero.
Step-by-step explanation:
To determine the vertical asymptote of a given rational expression, we need to identify values of x for which the denominator of the expression is zero, and the numerator is not zero at that same point. Vertical asymptotes are vertical lines that the graph of a function approaches but never touches or crosses. Without the actual rational expression provided, we cannot directly calculate the vertical asymptote. However, the options given (A. x = 2, B. x = -2, C. x = 1, D. x = -1) are likely the results of solving for the values of x that make the denominator of the rational expression equal to zero. Since the expression in the question is not provided, it is not possible to choose the correct answer amongst the options specified.