When Setting Up a Wireless Network, an Administrator Enters a Pre-Shared

When setting up a wireless network, an administrator enters a pre-shared key for security. Which of the following is true?

A) The key entered is a symmetric key used to encrypt the wireless data.
B) The key entered is a hash that is used to prove the integrity of the wireless data.
C) The key entered is based on the Diffie-Hellman method.
D) The key is an RSA key used to encrypt the wireless data.