What are the features of connect offline?

Answer options:

A.View, edit, create, and delete accounts
B.Add and update products and schedules on opportunities
C.View, edit, create, and delete activities
D.All of the above

Correct Answer: D 
Using the connect offline, users can view, edit, create, and delete accounts, contacts, opportunities, activities, and leads in addition to custom objects. Users can also add and update products and schedules on opportunities. 
Reference: 

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