Total float measures the flexibility in an activity's timing within a schedule. It is defined as the amount of time an activity can be delayed without affecting the project's overall completion date or the completion date of any of its successors.
* Option A, B, and D accurately describe total float: it is calculated as the difference between early and late start/finish dates, can be positive or negative, and is associated with project completion.
* Option C describes free float, not total float, and thus is incorrect.