Spiny,succulent Plants in the Americas Are Usually in the Cactaceae

Spiny,succulent plants in the Americas are usually in the Cactaceae family,while nearly identical plants in the Mediterranean and northern Africa are in the Euphorbiaceae family.A phylogeny based solely on morphology

A) is the basic definition of the systematics approach called cladistics.
B) requires full identification of all the living and fossil species, before relationships can be assessed.
C) places both the Cactaceae and Euphorbiaceae in the same family clade.
D) establishes an accurate evolutionary link, through ancestry of the cactus and euphorb plants.
E) can lead to proposals of inaccurate relationships, because of convergent evolution.