Answer:
The answer would be A.
Because a decade is 10 years there for the only option that would be correct would be A.
More effective than the other candidates, he would have been a great president when it came to negotiating with other countries. (if you talking about Bernie Sanders)
Explanation:
having a school library would be a great benefit instead if borrowing books you can stay in the library and study whenever you have free periods at school and it will be easier knowing that you can study in the library where there isnt much distractions because at home there are so many distractions like for e.g: a younger sibling, your neighbours,commotions, or the television
