In the following scenario, what has Emily's teacher failed to take into account?

A mother comes into the school and complains that her fifth-grade daughter, Emily, has always earned scores of "exemplary" or "outstanding" when allowed to work independently. When Emily is forced to work in groups, her grades suffer.

The teacher decides that if Emily wants to do all the work herself, she can—but tells the mother that it will mean Emily doing three times as much work on her project.

* Can be multiple answers *
A. that doing three times the work will exhaust Emily
B. that a student who always earns good marks in elementary school won't be prepared to handle frustration in middle school
C. that students often retain more when they work cooperatively
D. that cooperative work is an important skill
E. that students whose parents argue with teachers are more likely to argue with teachers themselves
F. that earning high grades on her independent projects will not necessarily mean Emily has the skills for the work world