Michelle Works in the Education System

Michelle works in the education system.Unfortunately,full-time work in her field has disappeared with the onset of the latest recession,so she works from contract to contract.Why would employers in her profession prefer to offer contracts each year rather than full-time work?

A) That's the way things are done in the new economy.
B) They can pay contract employees less than full-time employees
C) More people apply because of the flexibility that contracts offer.
D) Contracts make flexible benefit packages possible.