Tom produces commemorative t-shirts in a competitive market. If Tom decides to decrease his output, this will a. decrease his revenue, since the price falls as competitors increase their output to make up for his decrease in output. b. increase his revenue, since Tom's competitors will also decrease their output, so that price rises to offset the drop in Tom's output. c. decrease his revenue, since his output has decreased and the price remains the same. d. increase his revenue, since the output decrease leads to a higher market price