The quote from Lewis Carroll’s novel Through the Looking-Glass, "It takes all the running you can do to stay in one place" is the basis of a hypothesis used to explain which evolutionary phenomena?

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.