According to the Basel Committee's guidance on cyber resilience and operational risk, building a robust cyber risk culture requires a holistic approach that includes comprehensive training, clear responsibilities, and an overarching unified risk culture.

Choice A is correct. Continuous cyber training integrated throughout the entire employee lifecycle—from recruitment through termination—ensures that all personnel are aware of the evolving nature of cyber threats. Choice B is correct. Implementing effective processes and controls ensures that all stakeholders, including employees, contractors, and third-party vendors, clearly understand their roles in mitigating risks such as theft, fraud, or the misuse of the institution's IT facilities. Choice C is correct. Establishing a common risk culture aligns the entire organization towards the effective management of cyber-risk, ensuring a unified front against potential vulnerabilities.

Since options A, B, and C represent fundamental elements of enhancing cyber risk awareness and risk culture, Choice D (All of the above) is the correct answer.