Several new tetraploid species of a plant called salsify (Tragopogon) known as salsify have arisen in western North America. These new species each arose from a diploid species that went through the process of allopolyploidy. This mode of speciation is a type of ________ and it occurs ________.
A. allopatric speciation; very slowly
B. sympatric speciation; very slowly
C. sympatric speciation; almost instantaneously
D. allopatric speciation; almost instantaneously
E. adaptive radiation; very slowly
Answer: C
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