The Accompanying Table Below Shows How Total Donations, Average Donations

Multiple Choice

The accompanying table below shows how total donations, average donations, total labor costs and average labor costs vary depending on the number of employees State U hires for its fundraising activities.   
The Chair of the Economics Department at State U says that fundraising employees should be hired as long as their marginal benefit exceeds their marginal cost. If the University follows this advice, then ________ employee(s) will hired, and the net benefit (total donations minus total labor costs) will be ________. 

A) 1; $22,000
B) 2; $25,426
C) 3; $25,426
D) 2; $3,476