Which of the following statements is wrong about the relationship between development and operation period, development period and operation period in the hypothetical development method ( )
选项：

A:Development and operation period can be divided into development period and operation period.
B:The starting point of the development period is the same as that of the development and operation period.
C:Operation period can be specifically divided into sales period and operating period.‍
D:Development period and operation period will not overlap.