Consider the market for baseball caps. there are many producers in this market, and we assume that the technology of production is identical among these producers. a typical producer in this market has a u-shaped average variable cost curve with the minimum average variable cost at $2.50, and a u-shaped average total cost curve with the minimum average total cost at $3.50. what does the market supply of baseball caps look like in the long run? choose one: a. an upward-sloping curve that starts at the price of zero b. an upward-sloping curve that starts at the price of $2.50, with zero supply at a price less than $2.50 c. a horizontal line at a price of $3.50 d. an upward-sloping curve that starts at the price of $3.50, with zero supply at a price less than $3.50.