Which of the following best defines the word "aggressive" (Line 3,Paragraph 7)

A．Doctors will be held guilty if they risk their patients’ death.
B．Modem medicine has assisted terminally ill patients in painless recovery.
C．The Court ruled that high-dosage pain-relieving medication can be prescribed.
D．A doctor's medication is no longer justified by his intentions.

A．prolonged medical procedures
B．inadequate treatment of pain
C．systematic drug abuse
D．insufficient hospital care