When I attach a file to my e$-$mail, will SMTP send it to the e$-$mail server?

The common gateway interface $($CGI$)$ is responsible for sending e$-$mail file attachments.

The multipurpose Internet mail extensions $($MIME$)$ protocol is responsible for sending e$-$mail file attachments.

The dynamic host configuration protocol $($DHCP$)$ is responsible for sending e$-$mail file attachments.

The Voice over Internet Protocol $($VoIP$)$ is responsible for sending attachments.