Large and complex environments often fail in unexpected ways. Chaos engineering is a technique used to improve resilience by deliberately testing how systems behave under failure conditions. This helps organizations expose weaknesses, improve recovery mechanisms, and reduce user-impacting incidents over time.

A is not the best fit for reducing operational fragility. C improves quality in delivery pipelines, but it does not directly test operational resilience in complex live-like environments. D is a useful team agreement on completion criteria, but it is too limited for this scenario.

B is best because chaos engineering directly targets the uncertainty and fragility that often come with complex infrastructures, which is very consistent with HVIT's resilience focus.