Which of the Following Best Describes a Fundamental Control Weakness

Which of the following best describes a fundamental control weakness often associated with automated data processing systems?

A) Automated data processing equipment is more subject to systems error than manual processing is subject to human error
B) Automated data processing equipment processes and records similar transactions in a similar manner
C) Automated data processing procedures for detection of invalid and unusual transactions are less effective than manual control procedures
D) Functions that would normally be separated in a manual system are combined in an automated data processing system