Which of the following describes the phenetic species concept?
a. This concept draws species boundaries using shared derived characters that are unique to one monophyletic group and absent from all other populations in the phylogeny. b. This concept looks at populations that share a past evolutionary history and a common evolutionary fate.
c. This concept looks at organisms that are clustered together in a phenotype space and is often used by numerical taxonomists.
d. This concept describes species as groups of actually or potentially interbreeding populations, with no gene flow between them