How can moisture issues in buildings be inspected?

B is the correct choice because an effective inspection for moisture issues in buildings requires a comprehensive approach that combines multiple methods. Visual checks are essential for identifying obvious signs of water damage, mold, or leaks. However, these checks alone may not reveal concealed moisture problem areas.

Incorporating humidity measurements helps assess the moisture levels in the air, which can indicate potential problems especially in areas prone to high humidity or poor ventilation. Moisture meters provide a precise way to measure the moisture content within building materials, such as walls, ceilings, and floors, allowing inspectors to identify hidden water intrusion that is not visible to the naked eye.

This multi-faceted approach ensures that inspectors can accurately diagnose moisture-related issues, providing a deeper understanding of the building's condition rather than relying solely on one method, such as visual assessments, reports from tenants, or only using infrared cameras. Each method has its limitations, thus combining them creates a more reliable and thorough evaluation of moisture problems within a building.