单项选择题

It may be inferred that the author would classify which of the following modes of behavior as a referential symbol that originally derived from a condensation symbol

(A) Vocalizing inarticulately in order to express rage without using words
(B) Writing a pictographic character that vaguely resembles a physical object
(C) Flag signaling where the flag movement relies on an existing arbitrary code
(D) The use of right-lane highways by general agreement
(E) Genuflection to indicate one’s willingness to serve in a situation