Lewis and clark’s trip was a success. what evidence supports this statement? a)lewis and clark’s team discovered the rocky mountains, learned about two hundred plants and animals, and drew the first maps of the western united states. b)thomas jefferson wanted lewis and clark to find a water route from the mississippi river to the pacific ocean that would increase trade with native americans. c)during their trip, lewis and clark headed deeper and deeper into uncharted land, worrying that there would be battles with native americans. d)in may of 1804, lewis, clark, and the corps of discovery began their journey by sailing northwest on the missouri river.