He told us ________ she had done.

A. that all B. what all C. all what D. all which

选择D
all是先行词
然后which是定语从句连接词，充当done的宾语

all that，all和跟的词必是that

你好！ 都不对，应是all that ，all后不能跟which 希望对你有所帮助，望采纳。