Which of the Following Would Be an Example of Convergent

Which of the following would be an example of convergent evolution?

A) Neurons, synapses, and nerve nets emerged independently in the ctenophores (comb jellies) and in the eumetazoan lineage leading to bilaterians and cnidarians.
B) Neurons, synapses, and nerve nets emerged in the common ancestor of ctenophores (comb jellies) , bilaterians, and cnidarians but were lost in the poriferans (sponges) .
C) The centralization of neurons into brains and nerve cords occurred before the divergence of protostomes and deuterostomes.
D) All modern vertebrates feature a notochord inherited from a common chordate ancestor.
E) All of the above