The federalist papers were written

to promote the bill of rights
to encourage states to reconsider the articles of confederation
by alexander hamilton, james madison and john jay in defense of a strong federal government
to lobby state legislatures to enforce the freedom of religion, freedom of speech and freedom of the press among other freedoms
by john jay, thomas jefferson and george washington as a defense of the declaration of independence

The correct answer is by Alexander Hamilton, James Madison, and John Jay in defense of a strong federal government.

These papers were created as a means to justify why the delegates at the Constitutional Convention should ratify the new US Constitution. At the Constitutional Convention, there was much debate about the size and scope of the federal government. This is due to the fact that many Americans feared a strong central government after what happened with Great Britain and King George III. However, these three aforementioned men wrote over 90 different essays defending a strong federal government and how it would NOT infringe upon the rights of American citizens.

a.   it resulted in widespread unemployment.