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.
Explanation:
child may argue for a dog. The parents remind the child his sister is allergic to dogs. The boy uses the counterargument that she has been around some dogs without any problems. He is ready for each argument against the dog, perhaps stating there are breeds of dogs that are hypoallergenic.
Either B or C. I think B.