What is the correct function for the payoff (at expiration) of a short position in 2 call options (the options have the same price, expiration, strike, etc. They are identical).

2*Max{0, S-K}

Min{0,2(S-K)}

-2*Max{0,S-K}

-2*{Max{0,2(S-K)}

Min{0, S-K}

2*Max{0, S-K}

-Max{0, S-K}

Max{0, S-K}