Select the Statement That Best Explains Why Acetaminophen Is Effective

Select the statement that best explains why acetaminophen is effective in the treatment of headache pains but not effective in the treatment of muscle aches and inflammation.

A) Acetaminophen is effective against the pain of headache because it inhibits prostaglandin synthesis within the CNS but does not significantly inhibit the synthesis of prostaglandins in peripheral systems, which accounts for the lack of antiinflammatory activity.
B) Acetaminophen is effective against the pain of headache because it stimulates prostaglandin synthesis within the CNS but does not significantly inhibit the synthesis of prostaglandins in peripheral systems, which accounts for the lack of antiinflammatory activity.
C) Acetaminophen is effective against the pain of headache because it stimulates prostaglandin synthesis within the CNS but does not affect platelet aggregation or prothrombin time, which accounts for the lack of antiinflammatory activity.
D) None of these are correct.