单选题 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