Explanation: The activity duration estimates review is valuable in identifying risks associated to the time allowances for the activities or projects as a whole, with a width of the range indicating the degrees of risk.
Incorrect Answers:
B: The activity cost estimates review is valuable in identifying risks as it provides a quantitative assessment of the expected cost to complete scheduled activities and is expressed as a range, with a width of the range indicating the degrees of risk.
C: A Risk management plan is a document arranged by a project manager to estimate the effectiveness, predict risks, and build response plans to mitigate them. It also consists of the risk assessment matrix.
D: It describes how the schedule contingencies will be reported and assessed.