Psychrometry & Moist Air Thermodynamics

Why is air passed through a sensible heating process (as shown) prior to entering a deep-bed paddy grain dryer?

Options:

• (A) To lower its relative humidity and enhance its moisture-carrying drying capacity
• (B) To increase its relative humidity to avoid overdrying
• (C) To condense moisture onto the grain kernels
• (D) To reduce the velocity of air through the bed