During the X-ray situation, what must closures do during the workday?

The correct choice emphasizes that closures must be closed when in port during the X-ray situation. This protocol is crucial for safety and security reasons, as keeping closures closed minimizes potential exposure hazards and ensures that any radiological activities are contained. By maintaining closures during work hours, organizations can help prevent unauthorized access and mitigate risks associated with X-ray operations. This is important both for safeguarding personnel and for compliance with safety regulations that govern the operation of X-ray equipment.