The project owner considers quality to be the highest priority, followed by cost and schedule. You are concerned about the level of quality specified in the contract documents, and whether or not the owner's expectations will be met. Which of the following is the most important? 

a) Verification that materials and workmanship are installed under the approved submittals 

b) Review of the contractor's quality control program 

c) Familiarity with the drawings and specifications 

d) Approved submittals for the work are on file