Which sentence best compares Lewis and Clark's expedition with Zebulon Pike's expedition?
A.
Pike's expedition failed to gather useful information, while Lewis and Clark's expedition was a success.
B.
Both expeditions took place without President Thomas Jefferson's permission and caused conflicts with Spain.
C.
Both expeditions provided the United States valuable information about the trans-Mississippi west.
D.
Pike led a scientific expedition, while Lewis and Clark's expedition was mainly for military purposes.