If the person completing the project activity will be repeating the activity later in the project, the effect of learning curves should be considered when estimating duration for future repetitions of the activity.
Option B
Step-by-step explanation:
Duration is the total time required to complete or finish a project or work. It can be of days, hours, weeks or even months. It depends on the capacity and availability of all the required resources.
Effort is the total number of people hours that is needed to complete a task, i.e. it's the actual time that is spent on working on the project.
The effect of learning curves must be considered when estimating the future durations.