Which of the following contributed to the continued westward expansion into the mid-1800s? Question 3 options:

Access to travel by plane for more people

Mail delivery system (i. e. Pony Express)

Communication systems (i. e. telegraph)

Availability of the automobile

Pls quickly! which of the following statements about spanish plantations is not accurate? a. spanish plantation screw sugarcane for export to spain. b. the spanish had a little concern for the lives of the indians who worked on the plantations. c. spanish presentation grew a wide variety of crops and sent the produce to many different european countries. d. to replace the native americans our dying off the spanish important african slaves.

Which statement about the damages caused by the civil war is true?

In the human body which systems function primarily to defend the body against disease?