CAPM Practice: Demonstrate an understanding of project management planning

A milestone is a significant point or event in the project that has zero duration. 'Foundation Complete' represents a key achievement that marks the completion of an important phase of work.

**Why not A:** A task that can be completed in less than one day still has a duration greater than zero. "Foundation Complete" with zero duration indicates it is not a task at all but a milestone — a point-in-time marker that signals the completion of the foundation work phase.

**Why not B:** A zero-duration entry is not an error in a project schedule. Milestones are intentionally assigned zero duration to mark significant points or achievements. This is standard scheduling practice and does not require correction.

**Why not C:** A removed task would not appear on the schedule at all. "Foundation Complete" is listed with zero duration because it is a milestone, which is a deliberate scheduling element used to mark the successful completion of a significant project phase.