The Fetterman Massacre was an example of Plains Indians’ resistance to the building of the transcontinental railroad. Which of the following statements best explains why tribes often reacted to the railroad with hostility?A.They feared that the railroad would cause buffalo populations to grow out of control.B.They were upset that the railroad would bring business to their industries.C.They worried that the railroad would cause too many settlers to move to the West Coast.D.They were angered by the railroad’s constant advances into their lands.