Shark repellent is exchanged in a perfectly competitive market, and firms in this market hire labor in a perfectly competitive labor market. Which of the following would cause employment in this industry to decrease? Choose 1 answer: Choose 1 answer: (Choice A) The price of shark repellant decreases. A The price of shark repellant decreases. (Choice B) The cost of a substitute in production increases. B The cost of a substitute in production increases. (Choice C) Many unskilled workers enter the labor market. C Many unskilled workers enter the labor market. (Choice D) Worker productivity increases. D Worker productivity increases. (Choice E) There is an increase in the demand for labor. E There is an increase in the demand for labOr