_____ of the truth of the report, he told his colleagues   about it.     [      ]

A. Convinced                        

B. Convincing    

C. To convince                    

D. Having convinced

预防小儿营养性缺铁性贫血应强调（）

A.及时添加蛋黄、豆类、肉类

B.母乳喂养

C.给铁剂

D.及时添加蔬菜、水果

E.牛乳喂养