Statements B, C, and D are true. The statement A that says Jenkins is highly secure does not need any special security provisioning is false. Jenkins software needs constant integration and also supports multiple plugins. Jenkins has huge storage to support the build storage and also easy to configure for taking backups. So, only statement A is false and the other statements are true.
If you want to learn Jenkins, you can check out this Jenkins Certification program by Intellipaat.
You can watch this video to get a quick start with Jenkins:
