ABC Partnership Agrees to Hire an "Errand Runner" 20 Hours

Multiple Choice

ABC Partnership agrees to hire an "errand runner" 20 hours per week for the summer. Alan, a partner, interviews a college student and decides to offer her the job. But she says she needs a 40-hour-a-week job, so Alan agrees to make it 40 hours. What result?

A) ABC Partnership is not bound to hire her.
B) ABC Partnership is bound to pay her for 40 hours per week.
C) Alan is bound to pay her for 20 hours per week.
D) Alan has to pay her for 40 hours per week.