Which three configurations are needed for the softphone to work in Salesforce?

Universal Containers is using the Lightning Service Console for managing cases and wants to add a softphone to enable click-to-call capability.

Which three configurations are needed for the softphone to work in Salesforce? Choose 3 answers
A . Install an adapter from AppExdiange to work with third-party CTI systems.
B . Enable Live Agent in their community to chat with an agent.
C . Assign the correct Salesforce users to the Call Center.
D . Create a softphone layout and assign to user profiles.
E . Assign the Salesforce CTI license to Salesforce users.

Answer: A,C,D