We begin operation on this question with question with a look into the arrays of option in a bid to choosing the best

OPTION A- INCORRECT
It may bit be entirely down to decamping from one of the activities to another. Let's look at it from the interest point of view. It's possible the participants in the quit because they were conditioned to be in the group. More so, it's not entertaining as dancing would be, perhaps.

OPTION B- INCORRECT
This is not a fact because joggers use terrains that are prone to accidents and injuries and Rower would have to row in a medium that comes with harsh weather conditions some times.

OPTION C- INCORRECT
This is true although dancing is as exhaustive as the others could be. Dancing could also be tagged as more rigorous than jogging because while jogging and rowing is time-based dancing could be argued to be about getting it right before it shuts off which could take hours.

OPTION D- CORRECT
This assumption is very correct in that interest matters. Some participants might have been chosen randomly rather than on account of their personal choices. So sudden 'disinterest' in weeks could be as a result of not been in love with the activity they were grouped to participate in.

OPTION E- INCORRECT
This assumption is not true because statistics have proved otherwise. From the original article, it was Mentioned that about 50% of the participants in jogging and rowing have left while about 80% of those in Dancing were still present.