The correct answer is option A (Code). Code is the functionality that is not supported by Jenkins. Jenkins is an open-source java-based tool with build-in plugins that acts as a simple continuous automation server that helps to integrate various stages of DevOps together. Jenkins uses pipeline code to perform tasks like build, deploy, and testing.
If you want to learn Jenkins, you can enroll in this Jenkins course by Intellipaat.
You can watch this video to get started with Jenkins: