The project must be completed by October 13th so this date reflects a constraint on the project. 2 is incorrect, the project may be able to finish earlier than October 13. We do not have enough information to determine if this is earliest the project can complete. 3 is incorrect as the project could be scheduled to finish earlier than October 13. The constraint is that the project finish by October 13. 4 is incorrect as an assumption is something believed to be true, but not proven to be true.