We are confident that the step the Chinese government has taken to cope with the current crisis is ______ of great significance.

A．what

B．those

C．that

D．one

春节的时候，人们往往用在年画中画上鱼在莲叶间戏游表示“连年有余”，用在门上画五只蝙蝠表示“五福临门”，这里所用的表达心愿的方法是（）。