You want to use the Stackdriver Logging Agent to send an application's log file to Stackdriver from a Compute Engine virtual machine instance.
After installing the Stackdriver Logging Agent, what should you do first?

A. Enable the Error Reporting API on the project. B. Grant the instance full access to all Cloud APIs. C. Configure the application log file as a custom source. D. Create a Stackdriver Logs Export Sink with a filter that matches the application's log entries.