Answer:
C. sympatric speciation; almost instantaneously
Step-by-step explanation:
When new specie is evolved from the ancestral species which are surviving, this type of specification is called as Sympatric Speciation. Both ancestral and evolved new specie continue to live in the same geographical area. For example
In the question above a new tetraploid species of plant known as the salsifies have evolved in western North America from ancestral diploid species by allopolyploidy.