Is an important component of an infant's social-emotional, cognitive, and physical development.
a. persistence
b. attachment
c. object permanence
d. performing tricks

Which of the following statements best describes the terms of the treaty of guadalupe-hidalgo? a the treaty ended the mexican-american war, resulting in the u. s. finally being able to finish building railroads in texas. b the treaty ended the mexican-american war, resulting in mexico and the u. s. going back to their pre-war conditions. c the treaty ended the mexican-american war, resulting in the u. s. facing a lot of international backlash for the war. d this treaty ended the mexican-american war, resulting in mexico ceding a large amount of land to the united states.