The Transition from Fish-To-Amphibian Involved a Series of Changes in the Vertebrate

The transition from fish-to-amphibian involved a series of changes in the vertebrate lineage that are all now very well documented.Which of the following statements accurately reflects our knowledge of these evolutionary events? Check all that apply.

A) Early amphibian fossils,such as Ichthyostega,show important transitional characteristics including mobile neck,loss of opercular bones,appendages with digits,loss of fin rays,and fused sacral vertebrae.
B) Ancient tetrapodomorph fossils,such as Tiktaalik,show important transitional characteristics such as cervical vertebrae,tetrapod-like forelimbs,dorsoventrally compressed skull,and the loss of opercular bones.
C) Molecular analyses,such as the study of the structure of Hox genes,provide powerful evidence supporting evolution of tetrapod appendages.
D) New fossil evidence now indicates that the anurans are basal tetrapods.Higher vertebrates,including mammals,evolved from the frog/toad lineage.
E) We now know precisely the tetrapodomorph species that became the first amphibian.