Which organization has guidelines on keeping radiation exposure to a minimum?

The correct answer is B, as ALARA stands for "As Low As Reasonably Achievable." This principle is key in radiation safety and focuses on minimizing radiation exposure to both patients and healthcare workers. The ALARA concept emphasizes the need to keep radiation doses as low as possible while still achieving the intended medical or dental outcomes. It involves practices such as optimizing procedures, using appropriate shielding, and employing the lowest necessary x-ray settings.

While organizations like the CDC, ADA, and NIH also contribute to public health and safety guidelines, they do not specifically focus on radiation exposure guidelines in the same way that ALARA does. The CDC provides general health information, the ADA offers dental standards and practices, and the NIH conducts and funds medical research. Therefore, ALARA is the most relevant concept regarding minimizing radiation exposure.