They go to Cafe Cova where the waitresses are very patriotic in this wartime Italy. While there they appear to reminisce about WWI and think about the value or meaning of their medals in which Nick's medals he feels are not earned nearly as much as the medals of the others. A fellow soldier warns him never to get married.
Here is a website that will help you find the answer and understand the poem as well...
http://www.sparknotes.com/poetry/hopkins/section4.rhtml
If you do not wish to visit the site I believe the answer is A.
Because she is mourning her own mortality, because man is mortal.
The correct pronoun to be used in order to complete the sentence is the pronoun "she". So the complete sentence should be "She was elected to choir office", not the pronoun "it", because the verb "elected" only refers to a person. "It" can't be used to agree with the given verb.
