According to the sixth amendment, what can the woman do to support her court case?

A woman is accused of a crime. She says that she was nowhere near the scene of the crime. Her friends who were with her at the time are afraid they will be accused as well, so they refuse to appear in court as witnesses. According to the Sixth Amendment, what can the woman do to support her court case?
She can require the witnesses to testify.

Eliminate trade barriers

Explanation:

The goal of NAFTA was to eliminate barriers to trade and investment between the U.S., Canada and Mexico. The implementation of NAFTA on January 1, 1994, brought the immediate Elimination of Tariffs on more than one-half of Mexico's exports to the U.S. and more than one-third of U.S. exports to Mexico.

Hope this helps you.. Good luck!