In each question, there are five sentences or parts of sentences that form a paragraph. Identify the sentence(s) or part(s) of sentence(s) that is/are correct in terms of grammar and usage. Then, choose the most appropriate option.

A. So once an economy is actually in recession,

B. The authorities can, in principle, move the economy

C. Out of slump - assuming hypothetically

D. That they know how to - by a temporary stimuli.

E. In the longer term, however, such policies have no affect on the overall behaviour of the economy.