He has a large collection of books, many of which are written in English.

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

A．if you enjoy life, you must like yellow, orange and red
B．when you are quiet, you must prefer grays and blues
C．if you love green, you usually do what you have decided
D．if you love pink, you often go to flower shops