In accrual accounting, the matching principle states that:（）

A. expenses incurred to generate revenue are recognized in the same time period as the revenue.

B. an entity should recognize revenues only when received and expenses only when they are paid.

C. transactions and events producing cash flows are allocated only to time periods in which the cash flows occur.

梅尼埃病有两个特殊类型，分别是（）

A.vanderHoeve综合征

B.Cogan综合征

C.Tumarkin危象

D.Lexmoyez综合征

E.Hunt综合征