What does ALARA stand for, and which elements are the primary strategies to minimize exposure?

• A. ALARA means avoiding all radiation exposure.
• B. As Low As Reasonably Achievable.
• C. As Low As Reasonably Achievable; Time, Distance, and Shielding are optimized to reduce exposure.
• D. ALARA stands for 'Always Limit And Reduce Amount'.

Answer: (C)

ALARA stands for As Low As Reasonably Achievable. The best answer adds that Time, Distance, and Shielding are optimized to reduce exposure. In practice, this means: spend as little time as possible near the radiation source, maintain as much distance as feasible (dose drops with distance), and use appropriate shielding to attenuate the radiation. Together, these controls create a practical approach to keep doses as low as reasonably achievable, balancing protection with feasibility and cost. The other statements are incomplete or inaccurate: avoiding all exposure isn’t realistic in many settings, and simply restating the phrase without the concrete controls doesn’t capture how ALARA is applied.