The extent to which a program satisfies its specificationand fulfills the customer's mission objectives is said to beachieving the

a) Correctness

b) Reliability

c) Efficiency

d) None of thegiven

e) Usability

b) Reliability.

Explanation:

When the program gives correct output and fulfills the customer's requirements it is said to be reliable and said to be achieving reliability.

Correctness is when the program only provides correct solution.

Efficiency is when the program does the work in less time.

Usability means that the program is usable or not.