ABC Corp Is the Owner of a Hospital Where Doctor a a Is

ABC Corp. is the owner of a hospital where Doctor A is a visiting consultant. A conducted an operation at the hospital of a woman-neighbor but left two (2) gauzes inside the inscission of the patient resulting in infections and eventual death of the patient. Who can be sued for damages?

A) The patient's heirs can sue the doctor alone for his negligent act.
B) The heirs can sue the hospital alone.
C) The heirs can sue the hospital and the doctor solidarily because of the doctrine of corporate negligence of the hospital.
D) The heirs can sue the hospital and the doctor because the doctor is an employee, hence, they are solidarily liable.