单选题 A majority of HDTV consumers could not enjoy high-quality digital pictures because ______.

A、 they did not tune in to the right channel
B、 they did not install the system
C、 the market retailers created the confusion on purpose
D、 the manufacturers did not have a uniform standard for their sets

【正确答案】 B

【答案解析】[分析] 细节题型。根据第一段第三句Only a small percentage of the people who have purchased HDTVs, however, have actually hooked their TVs up to receive high-definition television digital signals．可知答案是B项。