A project manager is overseeing the construction of a new building. There are likely existing underground water, gas, and electrical lines. Which of the following is an example of mitigation?

A. Trust the contractor to do the job well because the company has been in business for a long time.
B. Tell the contractor that the company is responsible for any damage done to underground lines.
C. Immediately fix any broken lines that are hit during construction.
D. Ensure the contractor has the appropriate utility maps.