The answer is C. Tertiary.
Primary
medical Care is the medical care from the doctor that sees the patient first,
for example the family doctor.
Secondary
medical Care is the care provided by a specialist, upon referral by a primary
care physician, or in this
case the oncologist. If the
oncologist decides that a more complicated procedure is
required, he sends the patient to a highly specialized medical care
institution that is qualified to perform advanced and complex treatments over
an extended period of time. These procedures are performed by medical
specialists in state-of-the-art facilities.