What is essential for a Salesforce B2B Commerce theme to show up in the theme section in CC Admin?

What is essential for a Salesforce B2B Commerce theme to show up in the theme section in CC Admin?
A . The theme needs to be set as a Custom Setting in Salesforce.
B . The theme needs to be set in the Configuration Settings.
C . The theme needs to have "theme" in the name of the Static Resource.
D . The theme needs to be referred to in the head element on the page

Answer: C