Which of the following is a sign of proper water control from flashing?

The presence of dry areas around joints is a clear indication of effective water control due to flashing. Flashing is designed to direct water away from critical areas of a building, such as joints, seams, and transitions between different materials, to prevent moisture ingress. When joints are dry, it suggests that the flashing is functioning correctly, keeping water from penetrating into the structure and causing potential damage or deterioration.

The other options point to issues that would arise from insufficient water control. Visible moisture on interior walls indicates that water is entering the building, potentially leading to mold, decay, and structural damage. Cracks in the exterior facade may allow water to penetrate and suggest that the building envelope is compromised. Water pooling near foundations may lead to significant problems, including foundation erosion or damage, and often reflects poor drainage or waterproofing around the building. Thus, dry areas around joints stand out as a positive sign of proper water management practices.