B = Since the study began to solicit willing participants before the Research Ethics Review Committee of the college gave the research project its formal approval to gather data, the findings are invalid.
Deirdre did not graduate, instead she was advised by the faculty to withdraw from the program because her work was below acceptable standards.
Given this information only, it follows that A = Carol and Barbara deserved to receive "pass with distinction" like Anna.
The women in the other group were encouraged to use the same recommended regimen, but they were also advised to work at it individually, rather than with a partner or teammate.
After 50 days the physical health and the well-being of all the women in both groups were evaluated.