Offering support to colleagues and alerting management where appropriate is the best answer because managing workplace stress is not solely an individual responsibility. Analysts should recognise signs of excessive stress in themselves and others, respond constructively, and make use of appropriate organisational support mechanisms.

Option A is incorrect because stress management should be proactive rather than purely reactive. Waiting until stress has significantly affected performance or wellbeing makes intervention more difficult. Option B is also inappropriate; employees should not be encouraged to conceal legitimate concerns. Appropriate discussion with colleagues, managers, or available support resources can be an important part of managing stress.

Option D—maintaining a healthy work-life balance—is a useful technique for reducing personal stress and contributes to overall wellbeing. However, the question asks specifically about a responsibility for managing stress in ourselves and colleagues. Option C addresses the collective responsibility most directly because it involves recognising and supporting another person and escalating concerns through appropriate management channels where necessary. SDA v9 explicitly includes resilience and the detection and management of signs of stress.