Pessimistic time is

A.The maximum time which an activity might require
B.The average time required for a job
C.The time which has the highest probability of occurrence associated with it
D.The minimum time in which an activity can possibly be accomplished
E.The earliest possible time that an event can be reached or an activity completed.

Under progressive tax

A.the tax rate goes on increasing with an increase in the level of income
B.the tax rate is constant
C.the tax rate goes on decreasing with an increase in the level of income
D.the tax rate is inversely proportional to the net income