Why was medical information gathered about each soldier (in ww2)

The reason information was gathered for each soldier was because say they are hurt in anyway then the doc will have to know what kind of medicine  that the soldier could take and what they were not able to take
the doc also would need to know what type of blood they have if the need the blood do to a injury.
hope this helps 

"American ships have been sunk, American lives taken, in ways which it has stirred us very deeply to learn of . . . " is the one excerpt from paragraphs 1 to 3 of Wilson’s "War Message to Congress" that appeals most to the audience’s emotions. The correct option among all the options given in the question is option "B".