( ) is said ( ) he watched most the 2006 FIFA World Cup held

( ) is said ( ) he watched most the 2006 FIFA World Cup held in Germany.
A As,that
B it ,that
C which,/
帮我解释一下其他选项为什么错可以吗?尤其是A 的as为什么不对?我知道it is said that .的句型,但有as is said that的句型吗?顺便帮翻译.感激不尽.