(单选题)

What happened to those who ate breakfast before exercise?

A.They successfully lost weight.

B.They consumed a bit more calories.

C.They burned more fat on average.

D.They displayed higher insulin levels.

参考答案：B

参考解析：

细节理解题。根据第六段最后两句“As a result, they burned more fat during walks on an empty stomach than when they had eaten first. On the other hand, they burned slightly more calories(卡路里), on average, during the workout after breakfast than after fasting.”可知，结果，他们空腹散步时燃烧的脂肪比他们首先吃东西时所燃烧的脂肪要多。另一方面，平均而言，他们在早餐后锻炼时燃烧的卡路里略多于禁食后。因此可知，锻炼前吃早饭消耗更多一点的热量。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语