When configuring IPSec with IKE, if the transform set includes an ESP cipher algorithm, specify the cipher keys. In a Cisco IOS IPsec transform set, which two of the following items are valid for ESP cipher algorithms?(Choose two)

A.
esp-null, esp-seal

B.
esp-aes 256, esp-aes null

C.
esp-null, esp-aes 512

D.
esp-aes 192, esp-des, esp-3des