Question

which of these would be the best title for the yellow region of this map? a \the louisiana purchase\ b \slave states and free states\ c \the original united states of america\ d \states created by the northwest ordinance\

Explanation:

The original United States (the yellow region on the relevant historical map) refers to the area of the 13 original colonies and the early formed states before expansions like the Louisiana Purchase. Option A is about a land purchase (western expansion), B is about a division related to slavery (later period), D is about states from the Northwest Ordinance (northwestern region). So C fits as the best title for the original US area.

Answer:

C. "The Original United States of America"