Final answer:
Online Conflict Resolution is triggered after a version control system detects a merge conflict between branches during the process of merging code changes.
Step-by-step explanation:
The Online Conflict Resolution is typically triggered B) After detecting a merge conflict between a feature branch and the Promotion branch. Online Conflict Resolution comes into play during the version control process when multiple changes have been made by different developers to the same part of the code. This can occur when a developer tries to merge their feature branch into a shared branch, commonly the main or develop branch, and the version control system detects conflicting changes that cannot be automatically resolved.