What does the following command achieve?

What does the following command achieve?

Telnet <IP Address> <Port 80>

HEAD /HTTP/1.0

<Return>

<Return>

A.
This command returns the home page for the IP address specified B. This command opens a backdoor Telnet session to the IP address specified

B.
This command returns the banner of the website specified by IP address

C.
This command allows a hacker to determine the sites security

D.
This command is bogus and will accomplish nothing

Explanation:
This command is used for banner grabbing. Banner grabbing helps identify the service and version of web server running.