Why are vestigial structures not removed by natural selection? A. Vestigial structures are genetic traits.
B. They provide a competitive advantage.
C. Only unimportant structures can be removed,
D. Natural selection removes only harmful traits,

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.