A中的and还是不太懂: (A) they began to grow again after the 1991 report that linked moderate consumption of alcohol, and particularly of red wine, with a reduced risk of heart disease
句意为王,如果没有逗号,report linked consumption of alcohol and of red wine,在读者理解是consumption和心脏病link的时候,会认为是comsumption了alcohol和red wine一起,这个被and绑定的整体,不make sense,因为这两个名词是包含的关系,没必要一起被consumption。有了逗号,再接and,就会让读者知道这里有个停顿,说明要linked不是alcohol和red wine共同的consumption,而是特别指出的red wine的consumption。是红酒和心脏病的link。