Answer:
A film badge
Explanation:
The film badge dosimeter or film badge is a personal dosimeter used for monitoring cumulative radiation dose due to ionizing radiation. It of a photographic film and a holder. This film badge is used to determine or measure and record the radiation exposure as a result of radiations, x-rays, gamma rays and also beta particles.
The radiation detection device that is the best to use for measuring the presence of radiation in a large moving object is the first choice, A. The Film Badge
