Compared to Engaged and Committed Swimmers,which of the Following Is

Compared to engaged and committed swimmers,which of the following is not true relative to dropouts?

A) Dropouts participated in less extra-curricular activities.
B) Engaged swimmers started training camps and dry land training at an earlier age.
C) Dropouts became "top" swimmers at a younger age and took less time off from swimming.
D) Engaged and dropout swimmers did not differ in terms of swim practice time or swim competition time.