Final answer:
The nurse should report finding A. Mediastinal drainage 100mL/hr as it suggests possible complications after the coronary artery bypass graft (CABG) surgery.
Step-by-step explanation:
The nurse should report finding A. Mediastinal drainage 100mL/hr.
After a coronary artery bypass graft (CABG) surgery, it is expected to have mediastinal drainage, which is the drainage of blood and fluids from the surgical site. However, a drainage rate of 100mL/hr is considered excessive and may indicate bleeding or a possible complication. Therefore, the nurse should report this finding to the healthcare provider for further evaluation.