单项选择题

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.

15（）