Scrypt is safer than MD5, so answer A is wrong and answer D is correct R1(config)#username user secret ? 0 Specifies an UNENCRYPTED secret will follow 5 Specifies a MD5 HASHED secret will follow 8 Specifies a PBKDF2 HASHED secret will follow 9 Specifies a SCRYPT HASHED secret will follow <0-9> Encryption types not explicitly specified LINE The UNENCRYPTED (cleartext) user secret LINE The UNENCRYPTED (cleartext) user secret