John suggested () anything about it until they found out more facts. A. not to say B. not say C. to say not D. not saying

此题考察的是suggest的用法。suggest作为动词，意为“建议”，其后可接动名词或从句。当suggest后接动名词时，动名词应为逻辑宾语，即suggest doing sth.。而当suggest后接从句时，从句应为虚拟语气，即suggest that sb. (should) do sth.。根据题干，John建议不要说任何关于它的事情，直到他们发现更多的事实。因此，应选择动名词形式，且动名词应为否定形式，即not doing sth.。