Which is the best source of historical evidence to learn about how an event unfolded

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u. s. citizens need to protect in order to preserve the democratic political system and the american way of life.

How many categories of information are there

What was one of the characteristics of the ottoman empire under the rule of suleiman "the lawgiver"?