To buy a flat and send a child to kindergarten, how much will a couple pay each year（）

A．an underground testing site
B．an Indian meeting ground
C．a tourist attraction
D．a motor boat race course

A．would be little better than the fourth level
B．may be a lot more desirable than the first four
C．can be the last and most satisfying level
D．will become attainable before the government takes actions