A. how color influences our lives B. the various sources for extracting color C. how views about colors have changed D. how certain colors can have a calming effect
A. many centuries ago B. in the nineteenth century C. in the twentieth century D. only recently
A. black B. yellow C. blue D. red
A. yellow B. red C. blue D. pink.
A. They both have a calming effect. B. They both make people less hungry. C. They both express sadness. D. They both represent power.
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