The project sponsor reviewed your schedule and noticed that a few activities had a duration of zero. What do you tell the project sponsor?
A) The durations were intentionally set to zero to indicate milestones or events.
B) There was an error in data entry, and the durations need to be adjusted.
C) Zero-duration activities are placeholders and will be filled in with actual durations later.
D) The project schedule is accurate, and zero-duration activities are acceptable.
