Paramecia possess a nucleus, flagella and a contractile vacuole. So the answer is E.
Paramecia Possess: A. A Nucleus B. Flagella C. A Contractile Vacuole D. A And C E. All Of The Above?
As far as I know the answer is E - all of the above - as they do possess nuclei and flagella, but could not say for sure. It would be better to look through a good information page such as this one, and if you are still not sure you can type the word 'paramecium' in a search engine, followed by one of more of the alternative answers, and in this way you can find out for sure which of these answers is correct.