Which of the following is/are true about the usefulness of options as derivative securities? (Note: multiple answers with partial marks are possible) Select one or more: a. Options are useful for speculators. b. For both bearish and bullish markets, the options strategies can be used as two-edged sword to make potential gain. C. Options are always the cheaper derivative security compared with futures d. Options serve as a potential insurance scheme to mitigate downside risk. e. Options give the option buyer and seller symmetrical rights depending on the state of the underlying asset at the expiry date. f. Receiving an option costs the buyer nothing. g. Selling an option is low risk for the seller. o h. As traders experience high volatility, they use options to hedge the volatility