In order to securely communicate using PGP, the sender of an email must do which of the following when sending an email to a recipient for the first time?

In order to securely communicate using PGP, the sender of an email must do which of the following when sending an email to a recipient for the first time?

A. Import the recipient's public key
B. Import the recipient's private key
C. Export the sender's private key
D. Export the sender's public key

Answer
A. Import the recipient's public key