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)levels of biological diversity have remained the same,with human-associated organisms replacing the few natural species displaced.
C)biological diversity has decreased for a short time,rebounding to higher levels relatively quickly.
D)biological diversity levels drop dramatically.