What effect did explorers gave on north america?

When European explorers discovered the New World, America. The following are the effects the followed the discovery:
a. Trade between Europe and Native American ensued.
b. Weapons from Europe were introduced to the natives and the method of hunting changed.
c. Europeans claimed lands and pushed the Indians to the west. Ownership of land was introduced.
d. Christian religion was introduced but heavily resisted by natives.
e. Native American languages slowly faded and were replaced by European languages.

If your answers look like this a) expansion through conquestb) development of a calendar c) development of a written language d) creation of a large road workthen the answer is dhope it