To evaluate the conclusion above, it would be most important to know the answer to which of the following questions? A. Have the average age of new high school graduates and the average age of new secretarial school graduates recently increased? B. Do some secretarial school graduates have college degrees? C. Given that women have a greater life expectancy than men, what are the relative proportions of men and women among high school and secretarial school graduates? D. Given that women have a greater life expectancy than men, what proportion of all women attend secretarial school? E. Has the proportion of high school graduates who attend secretarial school increased in recent years?