Option D is the correct answer. The question asks for a solution where code changes can be verified before being deployed to production. Option D uses Jenkins to monitor tags in the repository, deploy staging tags to a staging environment for testing, and only after successful testing, tag the repository for production and deploy it to the production environment. This approach ensures that code changes are tested before being released to production, which aligns with the requirement of verifying changes prior to deployment. Options A, B, and C involve deploying directly to production without a prior comprehensive testing phase, which does not meet the requirement outlined in the question.