Google Cloud Certified Associate Cloud Engineer Practice 2025 - Free Cloud Engineer Practice Questions and Study Guide

A and D are incorrect because they are not related to Kubernetes or deployment units. A billing account is simply a financial tracking tool and Spanner is a database service, neither of which are concerned with deploying applications.

B is also incorrect because although a Deployment Manager can be used to manage the deployment process, it is not the smallest unit of deployment in Kubernetes. A Pod, on the other hand, is the smallest deployable unit in Kubernetes and represents a single instance of an application or service. Pods can contain one or more containers that work together to create a specific application or service. Therefore, C is the correct answer.