Technician a Says That the Cam Brackets Used in a Variable

Multiple Choice

Technician A says that the cam brackets used in a variable rate spring are only in contact with the mainleaf when the chassis is unloaded.Technician B says that cam brackets are used to shorten the effective spring length when in contact with the mainleaf.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B