Suppose That the Salary Range for Recent College Graduates with a Bachelor's

Suppose that the salary range for recent college graduates with a bachelor's degree in economics is $30,000 to $50,000,with 25% of jobs offering $30,000 per year,50% offering $40,000 per year and 25% offering $50,000 per year and that in all other respects,the jobs are equally satisfying.Assume that in this market,a job offer remains open for only a short time so that continuing to search requires an applicant to reject any current job offer.
The expected starting salary for economics majors' is _______.

A) $30,000
B) $40,000
C) $45,000
D) $50,000