欧共体是由欧洲煤钢共同体、欧洲经济共同体和欧洲原子能共同体合并而成的。

A．The demand curve for flower vases will shift to the left and their price will rise B
B．The demand curve for flower vases will shift to the right and their price will rise
C．There will be a movement along the demand curve for flower vases and their price will go down
D．The demand curve for flower vases will shift to the left and their price will go down