A test and balance report has been submitted without documentation of domestic hot water recirculation readings.

B. >>>>>>>>>>>>>>>> Review the specification to determine if domestic water systems are included in the test and balance scope. 

First B (something to do in front!) and then depending on the type of contract for the Project ask for C or D.

start with action B and all other choice A, C , D can use after

Thanks for the invitation 

  B. 

Is suitable 

I would choose option (B) Review the specification to determine if domestic water systems are included in the test and balance scope. 

REVIEW THE SCOPE OF CONTRACTOR  SO B IS THE APPROPRIATE CHOICE .REST OF THE DECISIONS CAN BE TAKEN AFTER THIS CONFIRMATION.

When we turned in test reports and something been missing the report came back as rejected due to missing information and we had to complete the test or furnish the missing parts... therefore I would go with answer 

C. Return the report to the contractor with a request to complete the domestic hot water re-circulation balance. 

I paid for a service and want it done right and not doing parts of the contractors work or hire an other to finish the job.

I only do it when I have no time and need it ASAP, but than give the vendor a payment penalty for incomplete work...