Why do the interpretations of historical events often change ?

Why did jefferson make the louisiana purchase?

In the 1980s, more russians worked to encourage change in the government by a) establishing a new political system. b) rallying for democratic reforms. c) supporting the democratic system. d) resisting gorbachev’s reforms.

Which is guaranteed by the fifth amendment? o a person will have a speedy trial. or a person can refuse to testify against himself or herself. a person can not be forced to testify against his or her spouse. a person has the right to a trial by jury