Which of the following statements is true?

A

All medium quality Crop-2 producing regions are also high quality Crop-3 producing regions.

B

All high quality Crop-1 producing regions are also medium and low Crop-4 producing regions.

C

There are exactly four Crop-3 producing regions, which also produce Crop-4 but not Crop-2.

D

Some Crop-3 producing regions produce Crop-1, but not high quality Crop-2.