Which optimized pattern solves this lesson cleanly?

Question

Which optimized pattern solves this lesson cleanly?

Option A — Correct answer

Boundary DFS from the start cell using the original color.

Option B

Nested loops without visited state

Option C

Two pointers on a sorted array

Option D

Character frequency counting only

Explanation

Boundary DFS from the start cell using the original color.

Flood Fill - Boundary DFS Pattern Practice Quiz