How is Europe connected? a. extensive railways c. common communication systems b. the Chunnel d. all of the above

Apsychologist has developed a series of personality inventories and wants to determine if they are valid. one of the scales measures perfectionism, so he asks a colleague for advice on how to establish the validity of this scale. the colleague tells him that if he were to find a sample of people with personality disorder, these people would obtain high scores on a scale that measures perfectionism.

How did the end of the mexican american war result in growing sectionalism in the united states?

Restricting immigrants from entering a country may be based on what belief?