提出著名的税收四原则的英国经济学家是( )。

A．威廉·配第
B．攸士第
C．亚当·斯密
D．瓦格纳

Residents of an apartment complex are considering two possible plans for collecting recyclable trash. Plan 1—Residents will deposit recyclable trash in municipal dumpsters located in the parking lot. The trash will be collected on the first and the fifteenth days of each month. Plan 2—Residents will be given individual containers for recyclable trash. The containers will be placed at the curb twice a week for trash collection.
Which of the following points raised at a meeting of the residents, if valid, would most favor one of the recycling plans over the other

A．Residents will be required to exercise care in separating recyclable trash from nonrecyclable trash.

B．For trash recycling to be successful, residents must separate recyclable bottles and cans from recyclable paper products.

C．Penalties will be levied against residents who fail to sort their trash correctly.

D．Individual recycling containers will need to be made of a p and durable material.

E．(E) Recyclable trash that is allowed to accumulate for two weeks will attract rodents.