The suggested answer is A, B.
To configure SSL Forward Proxy, you can use either an enterprise CA-signed certificate or a self-signed certificate. An enterprise CA-signed certificate is issued by a trusted Certificate Authority and provides a higher level of trust. A self-signed certificate is generated by the organization itself and does not require a third-party CA, but it is less trusted by default. These two types of certificates are commonly used for setting up SSL Forward Proxy to manage and decrypt secure traffic.