Which of the Following Best Describes the Purpose of Non-Functional

Multiple Choice

Which of the following best describes the purpose of non-functional testing?

A) To measure characteristics of a system which give an indication of how the system performs its functions
B) To ensure that a system complies with the quality standards set by ISO 9126
C) To ensure that the system deals appropriately with software malfunctions
D) To measure the extent to which a system has been tested by functional testing