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

A) A 5x5 version of the fish pattern, applied to eliminate candidates outside the intersecting region.

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

C) If all candidates for a digit in a box lie within a single row or column, eliminate that digit from the rest of that row or column outside the box. The reverse also applies.

D) A 3x3 variant of X-Wing where three rows align with three columns, allowing eliminations outside intersections.
