Which of the following statements about consistency is incorrect?( )
选项：

A:company applies the same accounting treatment to similar events from period to period.
B:Consistency means that companies do not switch from one accounting method to another.
C: A company can change accounting methods, but it must first demonstrate that the newly adopted method is preferable to the old.
D: If a company changes its accounting method,it must disclose it in the financial statements.