What Data Convinced Biologists That the Photosynthesis in Paulinella Chromatophora

What data convinced biologists that the photosynthesis in Paulinella chromatophora originated independently of the endosymbiotic events that gave rise to chloroplasts in green algae?

A) Nucleotide sequences of genes in the chloroplasts of Paulinella show that these organelles are most closely related to cyanobacteria different from those from which green algal chloroplasts arose.
B) Paulinella belongs to a different superkingdom from the green algae, and each superkingdom with photosynthetic members arose from a different endosymbiotic event.
C) Green algae have cell walls made of cellulose, but Paulinella does not.
D) Paulinella has a chloroplast that arose by means of a second endosymbiotic event incorporating a photosynthetic eukaryote; the presence of multiple membranes in these chloroplasts supports its independent origin from chloroplasts in green algae.