Which of the following defines the term 'risk'?

Which of the following defines the term ‘risk’?

Which of the following defines the term ‘risk’?
A . The potential of a situation or event to impact on the achievement of specific objectives.
B . A problem that is now or is about to breach delegated tolerances for work on a project or programme.
C . Scope creep within an uncontrolled project.
D . The use of estimation to determine costs, resources and activities.

Answer: A