well this is really more of an opinion question but I think people volunteer for military service to serve their country and to fight for their freedoms.
This is my opinion though so feel free to say your own thoughts.
Your answer would be A.
I used D and got it wrong but when i checked it was A
Here is the proof have a nice day!!
Answer:
hhhhhhhhh
Explanation:
proper noun: Mary
Collective noun: a herd of buffalo
Common noun: prairie
D