20. a federalist that promised that bill or rights would be added to the Consitution​

James Madison

To ensure adoption of the Constitution, the Federalists, such as James Madison, promised to add amendments specifically protecting individual liberties. These amendments, including the First Amendment, became the Bill of Rights. James Madison later became a Democratic-Republican and opposed many Federalist policies.

Explanation:

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.