Hey, this isn’t ab the question but don’t open that link they’re fake people and they can track your location
It should be C. because interrogative pronouns are used to ask questions.
Although there are many themes of "The Landlady" by author Roald Dahl, one of the main themes is appearance vs reality. The Landlady is very nice and generous towards Billy which causes him to ignore the sinister plot the Landlady is conjuring.
Can you post the actual question with the shown sentences?