The company's product requires a new technology that no one on the team knows. Experienced developers volunteered to learn and take full responsibility for it. What should the project manager do?

The best option is to support the developers. This approach fosters team growth, increases internal capability, and promotes a sense of ownership, which can lead to higher quality work and better long-term project outcomes. It aligns with agile principles of self-organizing teams and continuous learning. Outsourcing might seem faster but can lead to knowledge gaps, integration issues, and higher costs. Removing the requirement is not viable if it's essential for the product. Hiring external experts might be necessary if the learning curve is too steep or time is extremely critical, but it bypasses an opportunity for internal skill development and can be more expensive.