The primary difference between mega-analytic and meta-analytic approaches to study ageing is: a. One uses a large number of participants that are assessed by one measure and the other does not b. One includes raw data from several studies and one uses the findings of other studies to come to a conclusion c. They both have very limited contribution to our understanding of ageing d. One is a study conducted in different sites and the other includes several longitudinal studies conducted in one place, respectively Question 28 Not yet answered Marked out of 1 Flag question