In Defining User Needs, Which of the Following Are True

Multiple Choice

In defining user needs, which of the following are true (circle all that apply) :

A) the contractor defines the need first, then checks it with the customer
B) the user always knows what his needs are
C) there might be more than one user
D) the contractor should redefine the need in terms of the area in which he (the contractor) knows the most or has the greatest expertise
E) some of the needs might change and have to be redefined later