GRE Reading Comprehension: OG/PP2-GRE阅读OG/PP2 - UJ44KD4FZO48MZB4P

According to the passage, which of the flowing is true of the Colorado River flood of 1983? A. The flood had a negative effect on the river's trout population. B. There was substantial flushing of the river's native fish population during the flood. C. Unlike the 1996 flood, it was not deliberately caused for scientific research purposes.