Answer:
B.Because the water table was high enough not to need irrigation.
Step-by-step explanation:
Because the water table was high enough not to need irrigation is correct. Paragraph 8 tells about the development of fruit as a crop in the Valley, and clearly states that in these three counties, irrigation was not needed due to a high water table. Nothing was said about cattle in this paragraph, and although owners of large ranches having to sell their land was mentioned, it is in connection with the increase in land values and taxes, not the fruit crops.