Aren't they ______

A．colors may affect the emotional states of the people
B．colors may decide the results of our work and study
C．color preference can tell you who your friends are
D．color preference can help you to see through your enemies

A．color preference has something to do with one's character
B．colors have effects on human psychological states
C．you will know your friends or your enemies by knowing the colors they like
D．all of the above