這題英文解析如何呢?

後面的句子已經有主詞和受詞了，要用到who的時機是後面的句子缺少主詞或受詞的時候，而且這句用who意思怪怪的。最重要的是，這句是名詞子句，不是形容詞子句

The clause followed has a complete meaning in itself. It is independent of the main clause. It is called a coordinate NOUN clause;(D) what
The clause in not complete in meaning when it stands alone. It is dependent on the main clause. It is called a subordinate clause=eg:-Never tell your parents (C) who is stubborn,determined, and dead..---antecedent to a thing,event, being before cannot work that way.
Never tell your parents (D what)(what=the kind of things) I am telling you now is a type of NOUN clause,being co-ordinate clause to main clause;eg:-what I am telling=tell your parents=NOUN clause; not antecedent type..ie:-We need to coordinate our answer A=B vs B=A, of equal ranking to cause to A=B; B=A..-------------------------------------(o)

要用what
這句what代表要講的事情
如果是整句的話是Never tell your parents (the thing) I am telling you now
翻譯是不要告訴你雙親我正在告訴你的事情

應該是what ，用what 此兩句先後沒分別