MCQOPTIONS
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| 1. |
The western boundary of the cotton belt of the United States is determined by? |
| A. | 50 cm. by rain line |
| B. | 100 cm. by rain line |
| C. | by 100 frost-free days |
| D. | by 50 frost-free days |
| Answer» B. 100 cm. by rain line | |