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 .
Input: Statement: Most populations of the Western Marsh-harrier are migratory or dispersive. Some birds winter in milder regions of southern and western Europe, while others migrate to the Sahel, <MASK> basin and Great Lakes region in Africa, or to Arabia, the Indian subcontinent and Myanmar. The all-year resident subspecies harterti inhabits Morocco, Algeria and Tunisia.

Option A:

Option B:

Option C: Africa

Option D: Nile
Output:
Nile