Answer:
hope you have a nice day ! :)
Explanation:
The Alliance System played an important role in leading to the First World War mainly because it divided the European powers into two rival military camps, the Triple Alliance and the Triple Entente by 1907. The rivalry between the two camps brought about the First World War.
The reason why one case of influenza does not confer lifelong immunity is that the virus tends to mutate overtime which makes it unrecognizable to the immune system.
<h3>Why is it difficult to get immunity to influenza?</h3>
Influenza is caused by a virus which tends to mutate overtime in order to stay ahead of medical technology.
As a result, this mutation makes the original virus unrecognizable to the immune system which would then be unable to fight it.
Find out more on natural immunity at brainly.com/question/21480961
#SPJ1
The answer is B because it's saying how he would basically sacrifice his life for his country meaning he is a devoted American
B. Is the pronoun
Hope this helps
