What is the least amount of money for the tickets that machines sell

A．Not enough tourists.
B．Reduction in government support.
C．People are not interested in art any more.
D．Making their work less hard.

A．the housing shortage and the housing deprivation in Belgium
B．the deterioration of housing conditions
C．the government’’s macroeconomic and microeconomic policies
D．how to buy their own houses by the aid of the government