Althea Is a Student in Your Class

Althea is a student in your class. Althea wears a perfume called Essence of Efficiency. Bob really likes the scent of this perfume, and is disappointed on days when Althea doesn't wear it. Cathy is mildly allergic to this perfume. Her eyes water and her nose becomes runny when Althea comes to class wearing this perfume. Cathy is fineotherwise. This is a story about

A) too much perfume being produced
B) too little perfume being produced
C) an incomplete market
D) inadequate allocation of responsibility
E) market failure