Which of the following statements pertaining to software testing is incorrect? 

Answer options:

A. Unit testing should be addressed and considered when the modules are being designed.
B. Test data should be part of the specifications.
C. Testing should be performed with live data to cover all possible situations.
D. Test data generators can be used to systematically generate random test data that can be used to test programs.

C

Live or actual field data is not recommended for use in the testing procedures because both data types may not cover out of range situations and the correct outputs of the test are unknown.Live data would not be the best data to use because of the lack of anomalies and also because of the risk of exposure to your live data. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 7: Applications and Systems Development (page 251).