She doesn't know _________________ made her daughter so sad this morning.

 A. what was it    B. why it was that

  C. how that was   D. what it was that

She doesn't know _________________ made her daughter so sad this morning.

A. what was it    B. why it was that

C. how that was   D. what it was that

She doesn't know _________________ made her daughter so sad this morning.

1. A.
   what was it
2. B.
   why it was that
3. C.
   how that was
4. D.
   what it was that