3 А 5 4 с D B Based on the activity network pictured, what is the BEST statement? O a. Activity B is a critical activity and will start at day 1 or 2 O b. Activity C will start at day 4 and has 1 day slack time O c. Activity D is a critical activity and will start at day 9 O d. Activity A can start at day 1 or day 2
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