Which of the following geographical factors explains why wheat cultivation is highly successful in the Indo-Gangetic plains during the Rabi season?

Options:

• A: High temperature and heavy rainfall caused by the retreating southwest monsoon in winter.
• B: High clay content of the soil which retains water for long periods without any artificial irrigation.
• C: Moderate temperatures during the growing season, bright sunshine at ripening, and light winter showers from Western Disturbances.
• D: Constant humid conditions and absence of diurnal temperature variations throughout the crop cycle.

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