Joan didn't hail from a place called Arc, as the typical Anglicization of her father's surname, d'Arc (sometimes rendered as Darc or Tarc), might imply. Instead, Jehanne—or Jehanette, as she was known—grew up in Domrémy, a village in northeastern France, the daughter of a farmer and his devoutly Catholic wife.
it would be "How many children are affected by natural disasters every year?"
Explanation:
While the cousin would have experience with the other three and would therefor have answers, Unless she was a professional she would not know the answer to the third.