For years, a rare variety of camel was endangered because much of its habitat ... ...

For years, a rare variety of camel was endangered because much of its habitat was used as a weapons testing range. After the testing range closed, however, the population of these camels began falling even more quickly. Which one of the following, if true, most helps to explain the increased rate of population loss?
(A) The weapons tests had kept wildlife poachers out of the testing range.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2012 LSAT (PT67): Logical Reasoning A