下列选项中哪些是口腔健康教育方法（）
A.组织保证
B.经济支持
C.大众传媒宣传
D.行政干预措施
E.建立社区卫生服务机构
参考答案：C
Why didn't you ask for help,____ trying to do it on your own? [ ]
A. rather than
B. other than
C. more than
D. less than
