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Which piece of legislation signed by lyndon johnson brought an end to barriers preventing minorities from participating in elections?

How has urban renewal affected poorer neighborhoods in major cities? check all that apply. 1. communities have been transformed to meet the needs of the modern population. 2. old stores and factories have been renovated and used for new purposes. 3. crime rates have increased as more money has come into the neighborhoods. 4. many community businesses have gone into decline or been forced to close. 5. a number of african americans have been displaced from their homes.

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