Which two features should the Administrator enable to meet this requirement?

Universal Containers (UC) is using Service Cloud to handle cases coming from chat, phone, and emails. UC created a public self-service Community to offload some customer support questions by enabling Knowledge and Articles. UC wants users to be able to create a Case without logging into the Community.

Which two features should the Administrator enable to meet this requirement? Choose 2 answers Select one or more of the following:
A . Email templates
B . Web-to-case
C . Question-to-case
D . Guest Access to the Support API

Answer: B,D