Answer:
Because time varies with change in longitudes
The answer to this question is the second item in the choices which is "where older buildings were built on a thick layer of sediment". We know that seismic vibration is the sound or movement generated from the ground. This happening is unwanted and cannot be controlled. Once this occurs in higher magnitude it would cause great damage to our structure were buildings made of rock collapse.
Answer:
A. post civil war racial discrimination in the south
and D. African American communities growing in cities in the North
