The 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 net benefit of hiring fundraisers is largest when __ employe

The 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 net benefit of hiring fundraisers is largest when __ employees are hired.
A.2
B.4
C.3
D.1
正确答案：2