You Are Writing a Compute Engine Hosted Application in Project

Multiple Choice

You are writing a Compute Engine hosted application in project A that needs to securely authenticate to a Cloud Pub/Sub topic in project B. What should you do?

A) Configure the instances with a service account owned by project B Add the service account as a Cloud Pub/Sub publisher to project A
B) Configure the instances with a service account owned by project A Add the service account as a publisher on the topic
C) Configure Application Default Credentials to use the private key of a service account owned by project B Add the service account as a Cloud Pub/Sub publisher to project A
D) Configure Application Default Credentials to use the private key of a service account owned by project A Add the service account as a publisher on the topic