Which statement concerning exposure to microwave signal radiation is TRUE?

Correct Answer: Option D — The INMARSAT-B ray dome normally prevents nearby persons from being able to determine the direction of the internal antenna.

INMARSAT-B antennas utilize high-gain directional beams. The radome serves as a physical barrier, obscuring the internal antenna's orientation. This design prevents personnel from inadvertently standing in the direct path of high-intensity microwave radiation, which poses significant thermal hazards to human tissue if exposed at close range.