Choose the correct description for the following sudoku solving technique: Jellyfish

A) When only one position remains for a specific digit in the entire puzzle, place that digit there.

B) Two cells in a house that share the same two candidates allow those candidates to be removed from other cells in that house.

C) A 4x4 extension of X-Wing, where four rows and four columns align, permitting eliminations outside intersections.

D) Three interrelated cells where the pivot has two candidates shared with each of the other two cells. Any cell that sees both outer cells cannot contain the third candidate.
