Using the map and your knowledge of U. S. history, what do the details of the Rocky Mountains suggest about the Lewis and Clark expedition? Answer choices:
A) The group made a grave mistake in not turning back in Missouri.

B) The group really could have traveled by river all the way to the west coast.

C) The group would have been better off traveling by horseback the entire journey.

D) The group most definitely needed a guide to find the easiest route through the mountains. (im sorry the photo looks so bad my computer would not let me crop it but please please please answer the question im super stuck)