题目内容：
Accordingtotheauthor,whichofthefollowinghasbeenamplyproved?
A．Vegetariandiethasbroughtaboutmanylifestylechange B．Non-vegetarianshaveahigherriskofmanychronicdisease
C．Dietarychangesatregularintervalswillbenefitpeople'shealt
D．Dietaccordingtoone'sbloodtypewillhelppeoplemaintainoptimalweigh
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答案解析：