What steps must an administrator perform to make this possible?

Service agents working on a specific case type in SAP Service Cloud Version 2 need to access and perform defined actions in an external solution.

What steps must an administrator perform to make this possible? Note: There are 3 correct answers to this question.
A . Develop a custom business object.
B . Include a dedicated step pointing to the mashup in one of the phases of the case type.
C . Create a mashup to embed the web page of the external solution.
D . Define a custom screen for the mashup.
E . Use the web page URL of the external solution for extracting input parameters in the mashup

Answer: B, C, E