Consider the following statements related to man-nature interaction.

A. In Himalayan region pine trees are more prone to forest fire.

B. Shifting of cropping pattern from diversified crops to monoculture is a threat to food security in India.

C. Slum habitation is associated with metropolitan cities only.

D. Alternate cultivation of wheat and rice in rabi and kharif season deteriorate the nitrogen in soil.

Choose the most appropriate answer from the options given below: