In a perfectly competitive market, Group of answer choices both "a firm can sell as much as it wants at the existing market price" and "the additional revenue from selling one more unit of output is less than the market price". a firm can attract more customers by lowering its price. the additional revenue from selling one more unit of output is less than the market price. both "a firm can attract more customers by lowering its price" and "the additional revenue from selling one more unit of output is less than the market price". a firm can sell as much as it wants at the existing market price.\