Darwinian theory of evolution emphasizes two key concepts. Select the correct statement:
A) Adaptive radiation and branching descent are unrelated phenomena.
B) Adaptive radiation refers to the diversification of a common ancestor into various species, occupying different niches.
C) Branching descent implies a linear, unbranched progression of species from a common ancestor.
D) Both adaptive radiation and branching descent suggest a static, unchanging evolutionary process.