Mahatma Gandhi returned to India in .

Explanation:
Mahatma Gandhi returned to India from South Africa in 1915. After returning to India, he traveled the whole country to understand the people better and know the problems of the common man under the British regime and also became a part of the local Satyagrahas.

Final Answer:
Hence, the correct answer is option D. i.e, January 1915 (Mahatma Gandhi return to India from South Africa in January 1915.)