On the last shopping day before Christmas, stores across the United States were busy but not jam-packed as shoppers scrambled for last-minute gifts, even though some refused to admit it. At Boston’s Copley Mall, a small crowd gathered outside the main entrance of luxury department store Neiman Marcus, but no one waiting for the store to open would admit to being a last-minute shopper. "I’m really here to use a gift certificate and get something for myself and maybe someone else with what’s left over," said Matt Doran, who lives in Boston and had been waiting since 8:30 a.m. for the store’s 10 a.m. opening. Ilya Polykoff, who moved to Boston from Russia, said he was waiting "because I had the day off and I wanted to get some perfume." But he insisted that he was really shopping early because for him Christmas comes in January. The Orthodox Christmas will be celebrated on Jan. 7. "There are lots of men out there today," said Karen McDonald, a spokes-woman for mall operator Taubman Centers, after returning from the Lakeside Mall in Sterling Heights, Michigan. "There is panic out there but people seem to be in good spirits," she said, adding that most shopping traffic peaked around midday. According to the International Council of Shopping Centers, December 24 was the sixth busiest holiday shopping day in 1997, while 44 percent of holiday sales were recorded in the December 15 to December 24 period. Ed Nally, manager of the Swatch Store known mostly for its brightly colored plastic watches, described the atmosphere as festive rather than crazed. He did say, however, that Dec. 21 was the turning point date, after which shoppers started. "The closer to Christmas, the crazier they get," Nally said. "They become more agitated, less patient." He said red-hot items this year were phones, beepers and the new digital swatch watch that costs $ 70 and came onto the market a week before Christmas. From the passage we can infer that people would not admit to be a last-minute shopper because ______.

A. they wanted to use a gift certificate
B. Christmas would be celebrated on Jan. 7th
C. they did not want gifts recipients to know that they bought them gifts on the last day
D. they bought gifts during the shopping season lasting from December 15th to December 24th