It was a wonder that ---little food saved---many lives durin

It was a wonder that ___little food saved___many lives during the war.a)such,so b)so ,so
答案为什么是a呢 我记得little many之前只能用so,不能用such,语法书上也这么说,是答案错了还是这道题的理解不应该这样呢,大家帮帮忙3Q