Answer will be B C
https://docs.oracle.com/en/cloud/paas/api-platform-cloud/apfdv/typical-workflow-consuming-apis.html

Typical Workflow for Consuming APIs in the Developer Portal
To start consuming APIs with the Oracle API Platform Cloud Service Developer Portal, refer to the typical task workflow.

Task Description More Information
Register applications

Create entries for your applications in the Developer Portal.

Create an Application

Find APIs

Use the Developer Portal to discover and evaluate APIs.

Find APIs

Learn how to use an API

Review detailed documentation provided with an API to learn how to use it with your applications.

View API Documentation

Subscribe your applications to plans that provide access to APIs

After you’ve found an API you want to use, evaluate the plans that provide access to the API. Then subscribe to a plan to enable your application to begin using the API.

Subscribe to a Plan to Use an API

Review analytics for your applications

Use analytics metrics to determine how an application’s registered APIs are performing, review how often and why requests are rejected, and monitor data trends.

View Analytics for an Application