On november 9, 1989, the berlin wall, which had divided east and west berlin, came down. why had the berlin wall been built?

a. to prevent people from east berlin from going to west berlin

b. to prevent people from west berlin from going to east berlin

c. to protect berlin from flooding

d. to reduce the noise from traffic

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.

What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?

How long was it from the time african american men were given the right to vote until women were given the right to vote?