【单选题】

Once the logic of a network is laid out, the project manager will conduct a forward pass and backward pass through the network. This will provide information on the _____ and identification of the _____ . 

A Slack for each activity, critical path. 
B Slack for each activity, high risk activities. 
C Manpower shortages, high risk activities. 
D High risk activities, non-critical paths. 
E Manpower availability, contingency plans.