Which of the following statement is correct?

		Suppose you wrote a call option and you want to cover your downside, you can write put of the same underlying asset
		Suppose you wrote a call option and you want to cover your downside, you can buy risk-free asset
		Higher underlying asset volatility leads to higher call option price under the Black-Scholes formula is because there is longer time to exercise the option
		Higher underlying asset volatility leads to higher call option price under the Black-Scholes formula is because there is greater need to hedge for more volatile assets