Answer:
The correct answer would be C) Yeast.
Eukaryote is an organism which is composed of cell or cells which contains membrane bound cell organelles such as nucleus, mitochondria et cetera.
Yeast is an example of single celled eukaryotic organism.
They come under the knigdom fungi.
They are generally chemotrophs in nature and respire aerobically with the help of mitochondria.
They are used in production of several compounds (such as alcoholic beverages), in baking, bioremediation, probiotics et cetera.