The answer to this question will be a
I think it would be an idiom or allusion. More towards an idiom though.
Answer:
A,"My faults, according to this calculation, are heavy indeed"
Answer: B)
Explanation:
The correct question should be ''Who is responsible for watching the little children...?'' because in that case 'Who' will be the most appropriate solution.
If we put Which or Whom it would be like the previous text of the question is missing and with Who this question is complete. If we leave it with Whoever is would be like the rest of question is missing.