Simultaneous increases in the first-class postage rate from 20 to 30 cents and the overnight delivery rate from $1.00 to $1.10 will leave unaltered the proportion in which the two types of mail are consumed. A. False, more will be consuming overnight delivery relative to first class mail. B. Correct, more will be consuming first class mail relative to overnight delivery. C. Correct, more will be consuming overnight delivery relative to first class mail. D. False, more will be consuming first class mail relative to overnight delivery. E. None of choice are correct.