$22.$ In the context of a desirable model of communication between a sender and a receiver, all the following statements are correct EXCEPT:

a$.$

Noise should be at minimum level.

b$.$

Receiver should send a feedback message to the sender$.$

c$.$

Receiver must reply the message after decoding the message.

d$.$

Receiver should acknowledge first and then agree with the message sent by the sender$.$