Final answer:
The best translation of "symposium" in Plato's Symposium is Philosophy.C. Philosophy
Step-by-step explanation:
The best translation of the term "symposium" in Plato's Symposium is C. Philosophy. While the word "symposium" can be translated as "celebration" in English, in the context of Plato's text, it refers to a philosophical gathering or discussion. In the Symposium, Plato explores various philosophical ideas through a series of dialogues among intellectual and cultural figures.