How should this be accomplished?

A nonprofit organization is using Salesforce with the NPSP pre-installed. The nonprofit organization wants to give prospective volunteers a way to fill out their volunteer application online.

How should this be accomplished?
A . Create a web-to-case form in Salesforce with the fields needed to capture the information asked for on the form.
B. Set up the Volunteers for Salesforce Volunteer Signup Form on the nonprofit’s website.
C. Create a Chatter Group for prospective volunteers, assign them a Chatter Free license, and have users complete the form.
D. Set up the Volunteers for Salesforce Site Contact Information Site on the nonprofit’s website.

Answer: B