题目内容：
请根据短文内容，回答题。Chicken Soup for the Soul: Comfort Food Fights Loneliness
Mashed potatoes, macaroni and cheese, may be bad for your arteries. __________ (51) according to a study in Psychological Science, they're good for your heart and __________ (52). The study focuses on "comfort food" and how it makes people feel.
"For me __________ (53), food has always played a big role in my family," says Jordan Troisi, a graduate student at the University of Buffalo, and lead author on the study. The study came out of the research program of his co-author Shim Gabriel. It has __________ (54) non-human things that may affect human emotions. Some people reduce loneliness by bonding with their __________ (55) TV show, building virtual relationships with a pop song singer or looking at pictures of loved ones. Troisi and Gabriel wondered if comfort food could have the same effect __________ (56) making people think of their nearest and dearest. In one experiment, in order to make __________ (57) feel lonely, the researchers had them write for six minutes about a fight with someone close to them. Others were given an emotionally neutral writing assignment. Then, some people in each __________ (58) wrote about the experience of eating a comfort food and others wrote about eating a new food. __________ (59),the researchers had participants __________ (60) questions about their levels of loneliness.
Writing about a fight with a close person made people feel lonely. But people who were generally __________ (61) in their relationships would feel less lonely by writing about a comfort food. "We have found that comfort foods are consistently associated with those close to us." Says Troisi. "Thinking about or consuming these foods later then serves as a reminder of those close others." In __________ (62) essays on comfort food, many people wrote about the __________ (63) of eating food with family and fi'iends. In another experiment, __________ (64) chicken soup in the lab made people think more about relationships, but only if they considered chicken soup to be a comfort food. This was a question they had been asked long before the experiment, along with many other questions, so they wouldn't remember it. "Throughout everyone's daily lives they experience stress, often associated with our __________ (65) with others," Troisi says. "Comfort food can be an easy remedy for loneliness."
__________ A．but
B．if
C．though
D．while
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