题目内容：
回答题When Our Eyes Serve Our Stomach
Our senses aren't just delivering a strict view of what's going on in the world; they're affected by what's going on in our heads. A new study finds that hungry people see food-relatedwords more clearly than people who've just eaten.
Psychologists have known for decades that what's going on, inside our head affects oursenses. For example, poorer children think coins are larger than they are, and hungry peoplethink pictures of food are brighter. Remi Radel of University of Nice Sophia-Antipolis, France,wanted to investigate how this happens. Does it happen right away as the brain receives signalsfrom the eyes or a little later as the brain's high-level thinking processes get involved?
Radel recruited 42 students with a normal body mass index. On the day of his or her test,each student was told to arrive at the lab at noon after three or four hours of not eating. Thenthey were told there was a delay. Some were told to come back in 10 minutes; others weregiven an hour to get lunch first. So half the students were hungry when they did the experimentand the other half had just eaten.
For the experiment, the participant looked at a computer screen. One by one, 80 wordsflashed on the screen for about 1/300th of a second each. They flashed at so small a size that thestudents could only consciously perceive. A quarter of the words were food-related. After eachword, each person was asked how bright the word was and asked to choose which of two wordsthey'd seen -- a food-related word like cake or a neutral word like boat. Each word appearedtoo briefly for the participant to really read it.
Hungry people saw the food-reiated words as brighter and were better at identifying food-related words. Because the word appeared too quickly for them to be reliably seen, this meansthat the difference is in perception , not in thinking processes, Radel says.
"This is something great to me. Humans can really perceive what they need or what theystrive for. From the experiment, I know that our brain can really be at the disposal of ourmotives and needs," Radel says.
"Poorer children" and "hungry people" are mentioned in Paragraph 2 to show_______. A．humans' senses are influenced by what's going on in their heads
B．they have sharper senses than others
C．they lose their senses because of poverty and hunger
D．humans' senses are affected by what they see with their eyes
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