影响咀嚼效率最主要的因素是（）。

A.咀嚼肌

B.性别

C.牙的功能性接触面积

D.颌位

E.年龄

An analyst does researchabout lease. When compared to a leasor, which of the following is most appropriate adjustment to the balance sheet of a leasee（）

A. increasing assets and liabilities by the sum of future lease payments.

B. increasing assets and liabilities by the present value of future leased payments.

C. decreasing assets and liabilities by the present value of future leased payments.