2. Based on the passage, skeptics of the idea that rice cultivation began in the Yangtze River region can point to which of the following for support?
Lack of evidence supporting the existence of rice-farming societies along the Yangtze at an early date
Lack of evidence regarding the initial stages of rice cultivation in the Yangtze region
Recent discoveries pertaining to the historical geographic range of rice's wild ancestor
New information regarding the dates of very early domestic rice from Southeast Asia
New theories pertaining to how hunter-gatherers first developed rice agriculture in East Asia
3. Which of the following can be inferred from the passage about the “southern-origin theory”?
The theory is based on an unconventional understanding of how hunter-gatherers first developed rice agriculture.
The theory fails to take into account the apparent fact that evidence for the first stage of rice cultivation in the north is missing.
The theory was developed primarily in response to a 1984 survey of wild rice's geographic range.
Reassessment of the dates of some archaeological evidence has undermined support for the theory.
Evidence of sophisticated rice-farming societies in the Yangtze region provides support for the theory.
答案：CBD