Answer:
The answer is E
Step-by-step explanation:
This is because secondary endosymbiosis occurs when one living cell engulfs another cell that has undergone primary endosymbiosis. It means that there are now more membranes layers, one from the engulfed cell/organism and the other from the engulfed bateria/cell during the primary endosymbiosis.
This major species of protist undergo endosymbiosis, where one cell engulfs another such that the engulfed cell survives and both cells benefit i.e it allowed the engulfed cell to conduct photosynthesis through the presence of chloroplast.