Information technology has made many tasks easier, but not all task

Information technology has made many tasks easier, but not all tasks. Which of the following tasks performed by managers requires more critical thinking skills than the others because it is not as dependent upon information technology?
      
Analyzing and investigating the root causes of variances in responsibility center reports
      
Sensitivity analysis
      
Preparing responsibility center performance reports that identify variances between actual and budgeted revenues and costs
      
Rolling up individual units' budgets into the companywide budget