Official Solution:
Research in the nation of Veloria shows that only 18% of Velorians under 30 volunteer their time, while over 65% of Velorians over 30 participate in volunteer activities regularly. Despite the younger population forming a significant segment of society, nonprofit organizations predict that in ten years, the percentage of Velorians who engage in volunteer activities will likely remain stable or even increase.
Which of the following, if true, provides the strongest grounds for the nonprofits' prediction?
A. The number of Velorians under 30 is less than the number of Velorians over 30.
B. The number of nonprofit organizations in Veloria has increased significantly in the past decade.
C. The research defined a regular volunteer as someone who volunteers at least once a month.
D. The percentage of Velorians who engaged in volunteer work was higher 25 years ago than it is today.
E. The rate of volunteer participation among Velorians under 30 has traditionally been low.
(A) Incorrect. This answer choice weakens the prediction as it potentially indicates that the population is going to shrink, though the information is not very transparent since we need quite a bit more information about age and life expectancy, but either way, this answer choice either weakens or neutral. Eliminate.
(B) Incorrect. This answer choice does not support the prediction as it simply states there are more volunteer organizations. Having more non-profits does not help but one could argue this fact may draw in more people to volunteer but it may equally just spread them thinly among all the new non-profits. This answer choice does not provide strong support, but if you feel like it, you can hang on to it if no better / stronger candidate is found.
(C) Incorrect. This information is defining the concept of a volunteer but it does not help support the prediction. Eliminate.
(D) Incorrect. This answer choice potentially weakens the prediction as it implies there is a declining trend when it comes to volunteering. Eliminate.
(E) Correct. This is an interesting piece of information. If the rate of volunteer participation among those who are under 30 has traditionally been low, that means that 18% is not a relevant or meaningful indicator. And that it is completely normal to have only 18% of sub-30 adults volunteering. We do not know why the preferences change but perhaps the age has something to do with changing preferences of older adults when it comes to volunteering activities, perhaps due to free time, retirement, affluence, or other reasons. So this historical perspective supports the prediction the strongest among the answer choices.
Answer: E