Answer: Product differentiation strategy
Step-by-step explanation: In the given case, the industry in which Thomas works depicts features of oligopoly with few firms operating at high level. Thus, increase in price by Thomas would shift the demand for consumers to other firms.
Hence Thomas should opt for product differentiation strategy and should increase those features which classify its products different from the others. In such industries, quality is the core essence and costumers are wiling to pay slight higher prices if the quality of the product offered is higher than others.
Hence Thomas should narrow the completion and should focus on inventing some unique features in his products.