A Ring Species Evolves Due to a Process of Speciation

Multiple Choice

A ring species evolves due to a process of speciation that unfolds when:

A) There are distinct forms of a species (subspecies) that are capable of producing fertile hybrids
B) Subspecies are arranged across a temperature gradient
C) Subspecies are arranged along a geographic gradient
D) The arrangement of the ring species is such that the two ends of the gradient themselves meet and where they do those individuals do not interbreed.