Effectiveness of communication can be traced from which of the following?
(a) Attitude surveys
(b) Performance records
(c) Students attendance
(d) Selection of communication channel
Select the correct answer from the codes given below:
(A) (a), (b) and (d) (B) (a), (b), (c) and (d)
(C) (a), (b) and (c) (D) (b), (c) and (d)