Analysis of Options:

A. The organisation must attempt to identify and address every risk it faces:Incorrect. ISO 45001 focuses on OH&S risks and not every risk faced by the organization.

B. The effect of uncertainty (i.e. risk) can result in positive outcomes as well as negative ones:Correct. Clause 3.20 defines risk as the "effect of uncertainty," which may result in positive or negative outcomes.

C. Although organisations are required to carry out risk management, the method by which they do so is up to them:Correct. ISO 45001 does not prescribe specific risk management methods, leaving the organization to choose the approach that best suits its context (Clause 6.1.2).

D. Risk assessment is an activity that must be carried out by top management:Incorrect. Risk assessment can involve workers and other personnel; it is not limited to top management.

E. The organisation is required to assess risks arising from OH&S hazards:Correct. Clause 6.1.2.2 requires organizations to assess OH&S risks associated with hazards.

F. Risk is often expressed as a combination of likelihood and impact:Correct. This is a common way to express risk, aligned with Clause 6.1.2.

ISO References:

Clause 3.20: Definition of risk.

Clause 6.1.2: Hazard identification and risk assessment