After installing the Stackdriver Logging Agent, what should you do first?

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.

Answer: B