|Question 14Verbal

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The Canadian Longitudinal Study on Aging (CLSA-ELCV) is a longitudinal study surveying approximately 1,000 individuals in Canada to glean extended trends in aging. To carry out the necessary sampling of the population over many years, CLSA-ELCV needs extensive financial support, but this method provides valuable insights into causal relationships. However, when questions of causation are irrelevant, as with a fitness study seeking only to reveal the percentage of regular exercisers in a city who do weight training, longitudinal methods are unnecessary, and so       
Which choice most logically completes the text?
the success of the fitness study likely requires significantly less financial outlay than that needed for CLSA-ELCV.
A
the expense of CLSA-ELCV is likely greater than the cost of longitudinal studies of fitness.
B
longitudinal methods are suitable for studies of aging but ought to be avoided for those of fitness.
C
conclusions drawn from CLSA-ELCV are likely to be more authoritative than those from the fitness study.
D