（ ）is the influence of advertising that it can make a product famous overnight A such B this C that D so

（ ）is the influence of advertising that it can make a product famous overnight A such B this C that D so
（ ）is the influence of advertising that it can make a product famous overnight
A such B this C that D so

（ ）is the influence of advertising that it can make a product famous overnight A such B this C that D so
选A
考察一个结构：such is + 名词 + that +从句：翻译为“...就是...”
Such is the influence of advertising that it can make a product famous overnight.
它（指广告）能使产品一夜间突然成名；这就是广告的影响力.

选A。
考查such……that这个结构。而且such可作代词，此处正符合。