such+a/an+形容词+单数可数名词+that+从句,如：
She is such a lovely girl that everyone loves her.（她是如此可爱的一个女孩,以至每个人都喜欢她.）
It is such an interesting story that I want to read it again.（这是一个如此有趣的故事以至我想再读一次.）
such+复数可数名词/不可数名词+that+从句,如：
He showed such concern that people took him to be a relative.（他表现得如此关心以致于人们都把他当作亲戚了.）
所以选A.
B.没有such直接跟形容词这种说法.
C.one是表示可数名词单数,应该是such a one（也就是第一个答案）
D.同C