%_Pick up the correct statement from the following_%

• A. If the float is positive and the activity is delayed by a period equal to its total float, the completion of project in not delayed
• B. If the float of an activity is negative, delay in its performance is bound to delay the completion of project
• C. If the float of an activity is zero, the activity is critical and any delay in its performance will delay the whole project
• D. All of the above