If the optimistic time, most likely time and pessimistic time for activity A are 4, 6 and 8 respectively and for activity B are 5, 5.5 and 9 respectively, then

• A. expected time of activity A is greater than the expected time of activity B
• B. expected time of activity B is greater than the expected time of activity A
• C. expected time of both activities A and B are same
• D. none of the above