 
 <translate> According to the information in the question the maximum range would be between 600 and 760(160). The minimum range would be the greatest range for any one individual, which is listed in the problem as 90. So the difference between these would be 160-90 or 70.
The answer: (C). <ibo> Dabere na ozi dị na ajụjụ ahụ, oke kachasị ga-adị n'etiti 600 na 760 ((160). Ogologo kacha nta ga-abụ oke kachasị maka onye ọ bụla, nke edepụtara na nsogbu ahụ dị ka 90. Ya mere, ihe dị iche n'etiti ndị a ga-abụ 160-90 ma ọ bụ 70. Azịza ya bụ: (C). 