political scientists study grand strategies in order to understand how varying values and interests, leadership styles, and personal capabilities of decision makers influence the development of foreign policy.

Which of the following answer best explains the ideals or principles led to the concept of manifest destiny? a americans wanted the european countries to stay out of the north american continent. b americans felt they had a god-given duty to protect the land of the native americans. c americans thought they had a god-given duty to spread their culture and government. d americans learned about this concept from the native americans tribes had encountered.