The welcoming feast for the Triwizard Tournament in Book 4 (Goblet of Fire) takes place on Friday, October 30th, when the delegations from Beauxbatons and Durmstrang arrive. This feast precedes the selection of champions on Halloween. Option B is correct. Options A, C, and D are incorrect because the feast specifically happens on Friday, not Wednesday, Saturday, or Monday. The timing is significant because the champion selection occurs the next night (Halloween).