问题：

[单选题]Which of the following statement about defensive programming is incorrect?

AAssertions are mainly used after the release of the product to allow the program to self-check the code at runtimeFD2答案窝(daanwo.com)-大学作业答案分享平台

BIn order to avoid corruption of illegally entered data, we have to check the values of all externally sourced dataFD2答案窝(daanwo.com)-大学作业答案分享平台

CNeed to check the value of all input parameters of the subroutineFD2答案窝(daanwo.com)-大学作业答案分享平台

DWe can use assertions to prevent errors during the running of the codeFD2答案窝(daanwo.com)-大学作业答案分享平台