Please answer the following question: Many scientists find that colours can change people's feelings. It's very interesting. Some colours can make people feel relaxed,and some colours can make people feel nervous. Now,this kind of knowledge is being used in many places. For example, school walls are always painted green because green makes students feel relaxed. It is also good for the students' eyes. Some books are also green or light blue for the same reason. Restaurant owners not only have to know how to make food,but also have to know how to make money. Here are some things they've learned from scientific studies. The colour red makes people hungry. Many fast food restaurants have red furniture or walls. Soft colours like pink and light blue make people feel relaxed,so they spend more time eating. Loud music may be nice at first,but it soon makes people want to leave. Hard seats also make customers want to eat quickly and leave. Many restaurants,especially fast food restaurants,use this knowledge to make customers eat faster. Which colour isn't mentioned in this passage? A) Green. B) White. C) Light blue. D) Red.
Answer:
B