Consider the following terms used to study the functions of the material:
(1) Use value
(2) Esteem value
(3) Exchange value
(4) Scrap value
Which of these are used to identify in the value engineering approach?
(a) 1, 2, 3 and 4 (b) 1, 3 and 4 only
(c) 1, 2 and 3 only (d) 2, 3 and 4 only