The cost of removing x percent of pollutants is expressed by the function 240x/100-x, where C is in thousands of dollars. Which conclusion can be derived from this statement? A. The cost of removing 40 percent of the pollutants is $120,000 B. The cost of removing 80 percent of the pollutants is $960,000 C. The vertical asymptote lies at x= 0 D. The vertical asymptote lies at x= 240