You have the following time and cost information for use in a time-cost CPM scheduling model. Activity Normal Time Crash Time Normal Cost Crash Cost A $400 $ 600 $600 $1200 $300 $ 1500 What are the three costs per unit of time to expedite each activity? Multiple Choice A =$300, B = $200, C- $300 A -$100, B- $400, C = $300 O A- $200, B - $300, C - $400 A - $100, B - $200, C = $400