A nurse is assisting in providing care for a group of clients who have coronary artery disease who are all scheduled for coronary artery bypass grafts (CABG). Which of the following clients is at the highest risk for complications following the surgical procedure?

A client who has coronary artery disease (CAD) and chronic obstructive pulmonary disease (COPD)

A client who has coronary artery disease (CAD) and Bell's palsy

A client who has coronary artery disease (CAD) and chronic diverticulitis

A client who has coronary artery disease (CAD) and chronic allergies