Identify correct statements about Agricultural Systems of the world.

A. Rearing of sheep on the ranches of North America and cattle in Australia are typical example of pastoral herding.

B. Quebracho tree grown in Mediterranean regions is a principal source of tannin

C. The cattle in the savannahs are kept for their hides and flesh.

D. Prairies is one of the most advanced commercial grazing region of the World.

Choose the correct answer from the options given below: `