Trade can connect an empire because trade is a very basic aspect of advancement in a civilization/empire
The correct answer is: Voters have a wider choice of candidates and ideas.
In a bi party system there are only 2 options which in general have a very narrow ideology and therefore divide a country. As a voter you may not feel identified with any of them. When more parties participate, different ideologies are represented and those voters have a greater probability to find one that suits them. Also they have more chance that their ideas are represented in Congress.
Abraham was the first Patriarch of the Jewish people so he is D) The father of Judaism