OG 11 SC 27

Gega

Health officials estimate that 35 million Africans are in danger of contracting trypanosomiasis, or "African sleeping sickness," a parasitic disease spread by the bites of tsetse flies.                        
(A) are in danger of contracting
(B) are in danger to contract
(C) have a danger of contracting
(D) are endangered by contraction
(E) have a danger that they will contract

A是对选，但是如果D选改为 are endangered by contracting trypanosomiasis, 算对吗？endanger包含有生命危险的意思，contract为传染，我自己理解为生命被传染trypanosomiasis危害（直译），那么和A比较的话，那个算是优选呢？

谢谢解答，不胜感激