TOEFL Listening: ETS-TOEFL听力机经 - E_FF12WJ5U95M11CP$

What point does the professor emphasize about the region examined in the study he describes? A. Its steep mountainous position exaggerates the effects of water flow there. B. Its dry climate limits how much information it can yield about water movement. C. Its rainfall patterns and soil conditions are not typical of conditions in all regions. D. Its soil absorbs water at a much greater rate than soil in a more temperate climate.