【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．(A) Vocalizing inarticulately in order to express rage without using words

B．(B) Writing a pictographic character that vaguely resembles a physical object
C．(C) Flag signaling where the flag movement relies on an existing arbitrary code
D．(D) The use of right-lane highways by general agreement
E．(E) Genuflection to indicate one's willingness to serve in a situation