单项选择题

Read the following text. Choose the best word or phrase marked A, B, C or D for each numbered blank.
One factor that can influence consumers is their mood state. Mood may be defined 1 a temporary and mild positive or negative feeling that is generalized and not tied 2 any particular circumstance. Moods should be 3 from emotions which are usually more intense, 4 to specific circumstances, and often conscious. 5 one sense, the effect of a consumer’s mood can be thought of in 6 the same way as can our reactions to the 7 of our friends—when our friends are happy and "up", that tends to influence us positively, 8 when they are "down", that can have a 9 impact on us. Similarly, consumers operating under a 10 mood state tend to react to stimuli (刺激因素) in a direction 11 with that mood state. Thus, for example, we should expect to see 12 in a positive mood state evaluate products in more of a 13 manner than they would when not in such a state. 14 , mood states appear capable of 15 a consumer’s memory.
Moods appear to be 16 influenced by marketing techniques. For example, the rhythm, pitch, and 17 of music has been shown to influence behavior such as the 18 of time spent in supermarkets or 19 to purchase products. In addition, advertising can influence consumers’ moods which, in 20 , are capable of influencing consumers’ reactions to products.

A. extent
B. amount
C. scope
D. range
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