As human civilization spread around the world, there were species that benefited greatly from new human-made habitats. However, generally with the expansion of human populations and agriculture,
A. there has been an increase in biological diversity.
B. biological diversity levels drop dramatically.
C. levels of biological diversity have remained the same, with human-associated organisms replacing the few natural species displaced.
D. biological diversity has decreased for a short time, rebounding to higher levels relatively quickly.
Answer: B
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