According to jefferson, the main purpose of the trip was a economic b military c political d scientific

The best answer for this question would be:

A.      Economic

One of the goals of Jefferson was to find a water route through the continent. It was economic reasons to expand the industry, and for trading purposes. Although the Lewis and Clark expedition was also to explore the territory of Louisiana. 

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts