有意义的药物经济学评价和比较应具备的前提条件是什么？

A. people were ignorant of the rubbish disposal capacity of their country
B. government was in great dilemma of whether starts recycling or not
C. economics was in such recession as not be able to dispose the garbage
D. U.S. didn"t have enough dump sites to digest the waste

A. clear the misunderstanding of its meaning and its coverage
B. state that people tends to "like the new and hate the old"
C. manifest the fact people don"t record things about rubbish by sarcasm
D. prove that ignorance can lead to terror and inaction

A. a large proportion of waste is generated by developed countries
B. there are many other kinds of rubbish besides municipal waste
C. mining extraction generates large quantity of waste
D. agricultural waste makes up a large proportion of the total