Which of the following speciation processes is true?
A. Allopatric speciation is where new species arise in the same environment, where
one or more population groups accumulate mutations or differences over
generations that prevent them from mating.
B. Sympatric speciation is where new species arise due to geographic barriers or
isolation.
C. Parapatric speciation is where new species arise in an adjacent environment.
D. Sympatric speciation is where new species arise in an adjacent environment.