Which three elements should you define for the custom connector?

A company uses a third-party shipping company to deliver products to customers.
You need to design a custom connector that retrieves the shipping fees from the shipping company API.
Which three elements should you define for the custom connector? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
A. Authentication model
B. Address parameter
C. OpenAPI definition
D. Fee parameter
E. Fee reference

Correct Answer: ABC
Explanation/Reference:
Explanation:
C: You can create a custom connector using a OpenAPI definition file or a URL to OpenAPI definition.
B: On the Security page you get to choose how to authenticate to the API.

A: If you were to create a Custom Connector from scratch, then you whould have to study the API you have chosen and type in the URL manually here.

Reference:
https://carinaclaesson.com/2019/09/06/setting-up-a-custom-connector-from-an-openapi-file-and-utilizing-it-in-powerapps-and-flow/