Based on source a, was the legacy of columbus a positive or negative thing?

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?

Why did poland, hungary, and east germany join the warsaw pact? a)their people voted to join in free elections. b)their efforts to join nato failed. c)they wanted to stop the spread of communism in europe. d)they were soviet satellites that had little choice.

Which timeline correctly organizes the founding of important world religions? world religions • christianity was founded about 2,000 years ago. • islam was founded about 1,400 years ago. • hinduism was founded about 3,500 years ago. • buddhism was founded about 2,500 years ago. • judaism was founded about 4,000 years ago.