The etymology of the word placebo is derived from the Latin verb for "I shall please." and in the classical sense, a placebo is an imitation medicin-e that a doctor gives to calm an anxious patient, or to placate a persistent one perhaps demanding pills the physician is unwillingly to administer.

1. The word "one" in the passage refers to

(A) sense
(B) placebo
(C) doctor
(D) patient

답이 C인데 전 D를 골라서 틀렸네요.. 이해가 안갑니다.

그리고 doctor 과 physician의 차이가 뭔가요? 단순히 의사 내과의사의 차이인가요?