What Conclusion Did Darwin Come to After Observing 14 Species

Multiple Choice

What conclusion did Darwin come to after observing 14 species of finches in Galápagos Islands?

A) All of the finch species had descended from a single common ancestor.
B) All of the species descended from 14 different founder finches.
C) All of the species resembled finches on the South American mainland.
D) All of the species exhibited identical lifestyles, including diet.