What is a housing concept that produces a high density of residential housing units, a maximum use of open spaces and greater development flexibility, which results in lower-priced homes and minimum maintenance costs?

How has the elimination of trade barriers affected the movement of goods among member countries of the european union? a. member countries are able to produce all the goods they need. b. goods can move freely among member countries. c. member countries no longer need to trade with countries outside the eu. d. larger countries are able to import more goods than smaller ones.