Which of the following statements explains portability in non-functional requirements ?

A. It is a degree to which software running on one platform can easily be converted to run on another platform
B. It cannot be enhanced by using languages, OS’ and tools that are universally available and standardized
C. The ability of the system to behave consistently in a user-acceptable manner when operating within the environment for which the system was intended
D. None of the mentioned

Explanation: Option c is termed as reliability and option e refers to efficiency.