Final answer:
The attributes that apply to the risk timeline include: the possibility of risk occurring at any time during the project duration, the ability to mitigate or terminate certain risks through project management activities, and the difficulty in assessing and identifying emerging and future risks.
Option c is correct.
Step-by-step explanation:
The risk timeline in a project refers to the time frame during which risks can occur. Option a is correct because risks can occur at any time during the project duration. Option b is not entirely accurate as certain risks may be mitigated or terminated by the project management activities, not just the time phase.
Option c is correct because emerging and future risks are generally more difficult to assess and identify.