Which statement best completes the timeline?

A horizontal line with 5 events represented by vertical lines on it. Text that reads: Line 1 The Mehrgarh civilization begins farming along the Indus River. Line 2 The Harappan civilization develops writing and complex art. Line 3 ?. Line 4 The Mauryan Empire unites the Indian subcontinent. Line 5 The Mughal Empire spreads Islam throughout India.
A.
The Gupta Empire introduces Buddhism to India.
B.
The countries of India and Pakistan are formed.
C.
Religious stories are written down in the Vedas.
D.
The British East India Company conquers India.