 Understand Total Float:

Total float is the amount of time an activity can be delayed without affecting the project completion date.

 Review the Network Diagram and Logic:

Activity F is not on the critical path, which allows for flexibility.

Analyzing the paths and slack in the diagram confirms that Activity F has the most total float.

 Cross-Verification:

Option A: Incorrect. Activity I is on the critical path with no float.

Option B: Incorrect. Activity C is not the most flexible.

Option D: Incorrect. Activity D has limited slack.

Option C: Correct. Activity F has the maximum total float.