Identify an application that polls AWS Data Pipeline for tasks and then performs those tasks.

A.
A task executor

B.
A task deployer

C.
A task runner

D.
A task optimizer

Explanation:
A task runner is an application that polls AWS Data Pipeline for tasks and then performs those
tasks. You can either use Task Runner as provided by AWS Data Pipeline, or create a custom
Task Runner application.
Task Runner is a default implementation of a task runner that is provided by AWS Data Pipeline.
When Task Runner is installed and configured, it polls AWS Data Pipeline for tasks associated
with pipelines that you have activated. When a task is assigned to Task Runner, it performs that
task and reports its status back to AWS Data Pipeline. If your workflow requires non-default
behavior, you’ll need to implement that functionality in a custom task runner.
http://docs.aws.amazon.com/datapipeline/latest/DeveloperGuide/dp-how-remote-taskrunnerclient.html