Three consecutive activities A, B and E (in that order) have their T—Duration (in days) vs. C—Direct Cost (in monetary units) relationship expressed in the following table:ABCTCTCTC8156741191476411101687613 What is the optimum duration for the corresponding minimum total direct cost for all the three activities when taken up consecutively without pause or disruption?

Three consecutive activities A, B and E (in that order) have their T�

1.	Three consecutive activities A, B and E (in that order) have their T—Duration (in days) vs. C—Direct Cost (in monetary units) relationship expressed in the following table:ABCTCTCTC8156741191476411101687613 What is the optimum duration for the corresponding minimum total direct cost for all the three activities when taken up consecutively without pause or disruption?
A.	22 days
B.	21 days
C.	20 days
D.	19 days
Answer» D. 19 days