单选题
Dr. Griffiths's research helps you find out ________.
A、
which group of gamblers played the game better
B、
a chemical to increase gamblers' heart beat
C、
a way to help gamblers give up gambling
D、
when gamblers should be given drugs
【正确答案】
C
【答案解析】
[解析] 事实细节题。题目询问格里菲思医生的研究所起的作用。由第四自然段Based on Dr．Griffiths's research，doctors suggest that one way to help regular gamblers to give up gambling．．．可知。
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