12 Select the correct answer. Which statement is true about the graph of function f? A. The graph has a vertical asymptote of and is decreasing as x approaches positive infinity. B. The graph has a vertical asymptote of and is increasing as x approaches positive infinity. C. The graph has a horizontal asymptote of and is increasing as x approaches positive infinity. D. The graph has a horizontal asymptote of and is decreasing as x approaches positive infinity.