17 Which of the following statements about public diplomacy and traditional diplomacy is correct?
(A) The key role of public diplomacy is the state； the key role of traditional diplomacy is the people.
(B) Public diplomacy aims at shaping preferences； traditional diplomacy aims at imposing ideas.
(C) Public diplomacy derives its power from coercion； traditional diplomacy derives its power from attraction.
(D) Public diplomacy is maintained through propaganda； traditional diplomacy is maintained through partnership.