Step 1: Understanding Gandhi's return to India.
Mahatma Gandhi returned to India from South Africa in 1915 after spending over two decades there, during which he led campaigns for civil rights and social reforms. His return marked the beginning of his active involvement in India's freedom struggle.
Step 2: Analyzing the options.
(A) 1885: This is incorrect. Gandhi returned much later than 1885.
(B) 1890: This is incorrect. Gandhi was still in South Africa in 1890.
(C) 1909: This is incorrect. Gandhi returned much later than 1909.
(D) 1915: Correct. Gandhi returned to India from South Africa in 1915.
Step 3: Conclusion.
The correct answer is (D) 1915, as that is when Mahatma Gandhi returned to India from South Africa.