Which of the following is a true statement?
A. Mandatory features screen out possible solutions; essential features are the important capabilities of a system that will serve as the primary basis for comparison of different design strategies.
B. Essential features screen out possible solutions; mandatory features are the important capabilities of a system that will serve as the primary basis for comparison of different design strategies.
C. Mandatory features screen out possible solutions; essential features are those that users could live without.
D. Essential features screen out possible solutions; mandatory features are those that users could live without.
E. Desired features screen out possible solutions; mandatory features are the important capabilities of a system that will serve as the primary basis for comparison of different design strategies.
Answer: A