Looking at differences between a single firm within a perfectly competitive market and a monopoly. which of the following is true? 0 a} A single firm within a perfectly competitiye market, sees the entire downward sloping demand curve of the perfectly competitive market. 0 h] A single firm within the perfectly competitiye market can set its price at any level and will not see a change in the demand. 0 c] Because it is the only producer in the market, the monopoly sees the entire downward sloping demand curve of the market. 0 d} Because it is the only producer in the market, the monopoly will sell the same amountr no matter what price it charges. 0 E} A single firm within a perfectly competitive market must be concerned about the impact of the price effect and the quantity effecL