Answer:
The cat's tail.
Explanation:
Possessive form usually means you add 's to the end of the noun that owns the object. You always put the noun directly in front of the thing that it owns in possessive form.
I think the correct answer from the choices listed above is option C. In stock market, even non-investors are influenced by the stock market constantly. The stock market is the market in which shares of publicly held companies are issued and traded either through exchanges or over-the-counter markets.