Which Features Would Most Likely Be Characteristics of a Protist

Multiple Choice

Which features would most likely be characteristics of a protist with a multinucleate plasmodium that moves by cytoplasmic streaming and consumes yeasts, bacteria, and plant and animal remains via phagocytosis?

A) Heterotrophy and quick movements in shallow freshwater ponds
B) Photosynthesis and a symbiotic relationship with oceanic radiolarians
C) Heterotrophy and slow movements over branches, rocks, and decaying logs
D) A secreted exoskeleton and floating movement among oceanic plankton
E) Multicellular form many meters long, supported by water, with a holdfast glued to rocks