Three Living Species X, Y, and Z Share a Common

Multiple Choice

Three living species X, Y, and Z share a common ancestor T, as do extinct species U and V. A grouping that includes species T, X, Y, and Z makes up

A) a valid taxon.
B) a monophyletic clade.
C) an ingroup, with species U as the outgroup.
D) a paraphyletic grouping.
E) a polyphyletic grouping.