Universal Container’s Salesforce Admin created site.com only user. Which of the following features would this user have in Salesforce? (Choose three options)

Answer options:

A.Create unlimited custom tab
B.Access the accounts and contacts objects
C.Access the content app
D.Use one custom app with up to 20 custom objects

Correct Answer: A, C, and D 
Site.com only user can create unlimited custom tabs. He can access the content app and use one custom app with up to 20 custom objects. 
Option B is incorrect because site.com only user cannot access the contact and account object, but he can access the content app. 
Reference: 

https://help.salesforce.com/articleView?id=standard_profiles.htm&type=5