is shown in the report, teenager problems are often connected with family life education.

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A. Which
(答案→)B. As
C. It
D. What
解析：答案：B　考查定语从句。句意为：正如报告所显示的那样，青少年问题常与家庭教育密切相关。关系代词as引导非限制性定语从句，可位于句首，代指后面整个句子，作从句的主语。故B项正确。