TOEFL Reading: ETS-TOEFL阅读机经 - UH39511SE2D61A31L$

According to paragraph 2, the fact that Bison priscus had giant horns suggests which of the following about its lifestyle A. The bison were probably more concerned with protecting themselves from predators than with fighting each other. B. The horns were probably more for display to attract mates than for use as actual weapons. C. Those individuals with smaller horns probably banded together to fight the males with larger horns. D. Individuals probably lived by themselves or with only a few other bison.