What is one of the primary techniques to limit radiation exposure in a professional environment?

The ALARA principles stand for "As Low As Reasonably Achievable," and they are fundamental in radiation safety practices within professional environments. This concept emphasizes the importance of minimizing radiation exposure to workers and the public by applying three key principles: time, distance, and shielding.

By focusing on keeping exposure levels as low as possible, organizations implement practices such as limiting the duration that individuals spend in areas of radiation, maximizing the distance from the source of radiation when possible, and using physical barriers to shield individuals from exposure. This approach is proactive and reflects a commitment to safety, recognizing that even small amounts of radiation can pose risks over time.

In contrast, options such as frequent breaks can help reduce fatigue but do not specifically target radiation exposure. Extended working hours would increase exposure risk, and increased monitoring, while important for safety, does not actively reduce radiation exposure itself. Thus, the ALARA principles are the cornerstone of radiation protection strategies, making them the best answer in this context.