A company is transitioning its event-driven application to the cloud to improve scalability and reduce operational costs. The application experiences variable traffic, with significant spikes during promotional periods. The company's goals include minimizing server management and optimizing costs by paying only for the compute resources used. Considering these objectives, which cloud computing model would BEST suit the company's needs? Choose the BEST option (1 out of 4) and explain why it is superior to the others, taking into account cost efficiency, scalability, and management requirements. Additionally, consider the implications of each option on the company's ability to quickly adapt to changing traffic patterns without incurring unnecessary costs.