Two critical path activities are candidates for crashing on a CPM network. Activity details are in the table below. To cut one day from the project's duration, activity ________ should be crashed first, adding ________ to project cost

Activity Normal Time Normal Cost Crash Time Crash Cost
One 8 days $6,000 6 days $6,800
Two 10 days $4,000 9 days $5,000

A) One; $400
B) One; $6,800
C) Two; $1,000
D) Two; $5,000
E) One or Two should be crashed; $1,400

A