求助阅读题一道 36套 exercise 24

qiuj

Why during sickness should body temperature of
warm-blooded animal rise? It has long been known that the
level of serum iron in animals falls during infection.
Garibaldi first suggested a relationship between fever and
iron. He found that microbial synthesis of siderophores --
substances that bind iron -- in bacteria of the genus
Salmonella declined at environmental temperatures above
37°C and stopped at 40.3°C. Thus, fever would make it
more difficult for an infecting bacterium to acquire iron and
thus to multiply. Cold-blooded animals were used to test
this hypothesis. Kluger reported that of iguanas infected
with the potentially lethal bacterium A. hydrophilia, more
survived at temperatures of 42°C than at 37°C, even though
healthy animals prefer the lower temperature. When
animals at 42°C were injected with an iron solution,
however, mortality rates increased significantly.  


10. If it were to be determined that similar phenomena  
occur in warm-blooded animals, which of the
following, assuming each is possible, is likely to be the
most effective treatment for warm-blooded animals
with bacterial infections?  
 (A) Administering a medication that lowers the  
     animals' body temperature
 (B) Injecting the animals with an iron solution
 (C) Administering a medication that makes serum  
     iron unavailable to bacteria
 (D) Providing the animals with reduced-iron diets
 (E) Keeping the animals in an environment with  
     temperatures higher than 37°C
答案选C  哪位大侠帮忙解释一下  谢谢！～～

Caroline89

文中的Thus 引导的那句话取非，得到bacteria 由于得到iron而飞速繁殖。
所以如果想要抑制这些bacteria,we need to make iron unavailable to them.
因此是C