​Which of the following addresses agency costs?

A) ​advertising for employee positions in as many outlets as possible
B) requiring employees to punch time clocks
C) instituting longer work days
D) ​reducing the number of holidays

Requiring employees to punch time clocks can help address agency costs by ensuring that employees are spending their time on work-related activities instead of personal activities. By monitoring employee time more closely, the company can reduce the risk of employees shirking their responsibilities or engaging in other behaviors that could ultimately harm the company. The other options do not directly address agency costs.