Discuss the events that took place during the development of life in the west

More and more people moved westward to claim lands that were once inhabited by Native Americans.  This was encouraged by the government.  This also led to several conflicts with Indians that would later lead to a war between the Indians and U.S. army.  In the end, the west was completely settled completing the U.S. expansion to that area.

Idont know which one is right   but i know that c is wrong and a might be wrong

Texas’ gulf coastal plains are the western extension of the coastal plain extending from the atlantic ocean to beyond the rio grande. its characteristic rolling to hilly surface covered with a heavy growth of pine and hardwoods extends into east texas. in the increasingly arid west, however, its forests become secondary in nature, consisting largely of post oaks and, farther west, prairies and brushlands.