Answer:
d. Call; Put; Puts
Explanation:
A call option is a financial agreement that gives the authority to buy a particular asset at a particular price in a specified time period. If an investor thinks that the price of a stock will go up they will exercise the call option to buy the stock at the agreed lower price when the market price is higher and thus make a profit out of the transaction.
A put option is a financial agreement that gives the right to investor to sell the stock at a higher price in case the price of the stock falls in a specific limit of time. This again allows investors to make profits when and if the put is exercised in case of fallen stock price.
Hope that helps.
