Answer:
The answer is Probably true
Step-by-step explanation:
The answer is probably true as a result of the fact that the some personnel exhbited greater survival survival knowledge or skill over others. This could be as a result of previous experience the migh have had when they are in difficult situation or it could be as a result of their previous training the might have undergone whose knowledge the applied in addition to the training the had during the experiment to find out what kinds of people function best under severe arctic climatic conditions.
The assumption could not be a certainty as a result of other underlying factors that might have lead to some of the personnel exhibiting greater arctic survival knowledge or skill than others.