According to the above text, it is true that...

A urban gentrification is a process which is happening only in the cities of Tallinn, New York City and London. B urban gentrification can be seen as a bad process if one considers only the drawback of having poorer inhabitants being driven out of their neighborhoods due to unaffordable housing prices. C urban gentrification is happening because of rise in crime rates and poor educational systems in urban centers. D urban gentrification is an advantageous process since suburban areas tend to have bigger and more comfortable houses and less pollution than urban areas. E urban gentrification has lowered the crime rates in New York City, where murder rates decreased considerably from 1990 to 2012.