Answer:
A. Conduct a worksite inspection
Explanation:
If OSHA receives a complaint from an employee who states that his or her workplace contains an environment that provides a high risk to all employees and is outside OSHA's safety standards, a workplace investigation should be conducted, before any action is taken. Who will do this investigation is OSHA itself which will conduct a workplace inspection and if proven to be unsafe and at high risk will take action and require that the safety issues be resolved.
