Rhodophyceae possesses the following unique characteristics (A) The septa between the adjacent cells have 'pit connections' (B) The flagellated motile stages are totally absent (C) Red algae exhibit low degree of epiphytism and parasitism (D) They contain water soluble phycocyanin pigment (E) The accumulated photosynthetic product is floridean starch Choose the most appropriate answer from the options given below