You are the project manager for your organization. You and your project team conflict with the amount of time allotted to complete certain activities. Several of the team members want to bloat the time associated with activities to ensure they will have enough time to complete their tasks should something go awry. Instead of overestimating their project activities, the project team should use which of the following? Select one: 

a. Capital reserve

b. Contingency plans

c. Contingency reserve 

d. Assumptions of plus or minus a percentage