Professor Smith Has Long Used Group Projects in Her Courses

Professor Smith has long used group projects in her courses. The groups have always performed extraordinarily well, and students seem to learn a great deal from such projects. Having just taken a new job at a different college, Dr. Smith finds that the group projects are of considerably lower quality. What might you conclude given the work of Karau and Williams (1993) ?

A) Professor Smith used to teach at a women's college, but is now teaching at a men's college.
B) Professor Smith used to teach at an ivy league school, but now teaches at a state university.
C) Professor Smith used to teach at a men's college, but is now teaching at a women's college.
D) Professor Smith used to teach at a state university, but now teaches in the ivy league.