YAML files can be used to define Kubernetes manifest files. i.e, option C
YAML is a data serialization language that is often used for writing configuration files. Depending on whom you ask, YAML stands for yet another markup language or YAML ain't markup language (a recursive acronym), which emphasizes that YAML is for data, not documents.
The Kubernetes resources are created in a declarative way, thus making use of YAML files. Kubernetes resources, such as pods, services, and deployments are created by using the YAML files. The following example helps explain the creation of the deployment resource by using the YAML.
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