The fact that blind people can "see" things using other parts of their bodies 【C1】______ their eyes may help us to understand our feeling about color. If they can 【C2】______ color differences then perhaps we, too, are affected by color unconsciously.
By trial and 【C3】______ , manufacturers have discovered that sugar 【C4】______ badly in green wrappings, that blue foods, are considered 【C5】______ and that cosmetics should never be packaged 【C6】______ brown. These discoveries have grown into a whole 【C7】______ of color psychology that now 【C8】______ application in every thing from fashion to interior decoration. Some of our 【C9】______ are clearly psychological. 【C10】______ blue is the color of the night sky and therefore 【C11】______ passivity and calmness, while yellow is a day color with associations of energy and incentive. For primitive man, activity during the day meant hunting and attacking, while he saw red as the color of blood and rage and the heat that came with 【C12】______ . And green is relevant to passive defense and self-preservation. 【C13】______ have shown that colors, partly because of their psychological associations, also have a direct psychological effect. People 【C14】______ to bright red show a(n) 【C15】______ in heartbeat, and blood pressure; red is exciting. Similar access to pure blue has exactly the opposite effect; it is a 【C16】______ color. Because of its exciting of connotations, red was chosen as the 【C17】______ for danger, but closer 【C18】______ Shows that a vivid yellow can produce a more basic state of 'alertness and alarm, so fire engines and ambulances in some advanced communities are now 【C19】______ around in bright yellow colors that 【C20】______ the traffic dead.
【C1】

A. besides
B. other than
C. without
D. rather than