Detailed Instructions: You are given a statement written in Assamese. Choose the most logical word from the given 4 options which can be used to replace the <MASK> token in the statement. Output the word from the correct option .
Problem:Statement: The Western Marsh-harrier is often divided into two subspecies, the widely migratory C. a. aeruginosus which is found across most of its range, and C. a. harterti which is resident all-year in north-west <MASK>.

Option A: Africa

Option B:

Option C:

Option D: Nile
Solution:
Africa