登录之后可查看解析

C is corrent because portions of the program may contain errors which are not reflected in the output. For example, if a "loop" in a program is not used in one application, it is not tested and therefore any errors within the "loop" cannot be detected.
A is incorrect because auditing inputs and outputs may satisfy the auditor as to the absence of program errors.
B is incorrect because the auditor"s lack of understanding of the entire program precludes the detection of all errors.
D is incorrect because while auditing inputs and outputs can provide important evidence, it will often be different than the evidence obtained by testing the program itself.