You work for a large technology company that aims to modernize its contact center to improve efficiency and customer service. The goal is to develop a machine learning solution to classify incoming calls based on the product being mentioned, so that these calls can be routed more quickly to the appropriate support team. The audio of the calls has already been transcribed into text using the Speech-to-Text API. Given the need to minimize data preprocessing and development time, what approach should you take to build the model?