George is working as a sales executive in Website Inc. He has to send the assessment report of the company workers to the chairman. He wants to ensure that only the chairman should be able to read the message. He decides to use asymmetric encryption to encode the message. Which of the following options states the characteristics of asymmetric encryption?

A.
A secure channel should exist between the two parties to transfer the shared key.

B.
The parties communicating with each other must share the key before exchanging any information.

C.
Previously unknown parties can conduct a transaction.

D.
Previously known parties can only conduct a transaction