Social networking sites are changing the way that businesses
a. pay their employees
b. find potential employees
c. write expense reports
d. fire bad employees

Social networking sites are changing the way that businesses B. FIND POTENTIAL EMPLOYEES.

Potential employees submit resumes with their own list of background references. Companies call these references as well as check the social networking sites where potential employees are signed up. This is to ensure that the behavior of the potential employee will not bring embarrassment to the company should the company hire the potential employee.