If a 10 Mg Morphine Produces a Greater Analgesic Response

If a 10 mg morphine produces a greater analgesic response than can achieved by ibuprofen at any dose , which of the following statements is correct ?

A) Morphine is less efficacious than is ibuprofen .
B) Morphine is less potent than is ibuprofen .
C) Morphine is a full agonist , and ibuprofen is a partial agonist .
D) Ibuprofen is ab competitive antagonist .
E) Morphine is a better drug to take for pain relief than is ibuprofen .