Why is it inaccurate to say that everyone who settled in the American

Why is it inaccurate to say that everyone who settled in the American West in the 1870s and 1880s traveled westward?

a. Many people in the Northwest traveled southeast to the Great Plains.
b. Mexicans traveled north and Asians traveled east to settle in the West.
c. Mexicans traveled east from California to settle in the Great Plains.
d. Western Europeans traveled east in order to settle in the West.
e. Asians in the west traveled east to reach the Great Plains.

ANSWER
B