A multicelluar being has a longer lifespan than a unicellular organism. It can also preform different tasks that a unicellular organism is unable to do.
I'd say the correct answer your looking for is B.
In multicellular, there some specialized cells which performs a particular function. In unicellular organisms, one cell perform all activities of the cell such as excretion, reproduction etc. But in multicellular organisms, some cells perform excretion, some cells help in muscle building which is responsible for movement and some other cells do the job of reproduction in the body of organisms. So specialized cells are advantage to multicellular organisms.
hoped this helped!
a. specialized cells perform specific...