Which of the following best summarizes the lewis and clark expedition?

it explored the louisiana territory for a year before harsh weather forced it to return to the east.
it lasted six months and laid the groundwork for settlement along the mississippi river.
it covered about eight thousand miles, mapping the louisiana territory and strengthening us claims to oregon.
it covered about eight thousand miles in its search for a northwest passage, which it eventually discovered.

ok from the research i have gathered i can at least say that summary 1, 2, and 4 are wrong. this is because the lewis and clark expedition lasted for like two years. not six months nor just 1 year. they also explored the western side of america to get a better look over of what  the western side looked like. so leaving the last option left, the correct answer that i can see is summary 3. i hope this helped katiebutt62.

saint clair’s defeat, (november 4, 1791), one of the worst defeats ever suffered by u.s. forces in indian warfare, precipitated by british-indian confrontation with settlers and militia in the northwest territory following the american revolution. despite specific provisions in the treaty of 1783 for the evacuation of its forts on the northwestern border, britain had failed to yield these lucrative fur-trading posts. in hopes of reclaiming lost hunting grounds with british support, a northwest indian confederation was gradually molded between 1785 and 1787, consisting mainly of shawnee, delaware, ottawa, iroquois, ojibwa, miami, and potawatomi. kentucky frontiersmen reacted to this threat by initiating raiding parties on native villages as early as 1788, and indian warfare flared up the following year.

answer: the third option is your answer

explanation: