Suppose You Were Asked to Determine Whether a Firm Was

Suppose you were asked to determine whether a firm was a price taker or a competitive price searcher by looking at a graph of the firm's cost and revenue curves. The key is that for the competitive price searcher,

A) the firm's marginal revenue curve lies above and to the right of the demand curve, not below and to the left.
B) there are only total costs, not variable costs, on the graph.
C) the firm's demand curve is downward sloping, not a horizontal line.
D) all of the above are true.