Why Is There Controversy Surrounding the Eukaryotic Tree

Multiple Choice

Why is there controversy surrounding the eukaryotic tree?

A) It suggests that the unikonts are evolutionarily derived from the archeplastids.
B) It suggests that amoebozoans are more closely related (evolutionarily) to red algae than green algae.
C) The tree lacks branches for species that have yet to be classified.
D) The root of the tree is uncertain such that it is unknown which supergroup was the first to diverge from all other eukaryotes.