Answer:
3. finding sources in the library
We can read many books in library which gives us education. Education is the main thing for our livelihood. We can discover new things and make or observe them.
The answer is most likely C. If not I am sorry.
"nor have we been wanting in attentions to our British brethren" i believe that this is the whole sentence. Wanting in attentions just means drawing attention to yourself, so in the context it means the American colonies didn't want to draw the attention of their "British brethren" it basically means they wanted to be inconspicuous:)
In Tennessee William's play A Streetcar Named Desire, Blanche tells her sister those words and the theme of the play that those lines reflect are "a woman's dependence on men."