We have now decided to choose Problem A. Please recommend several models and algorithms suitable for Problem A. Remember to start from the problem and model to solve the problem, not to model for the sake of modeling. The recommended models should include traditional models, innovative models, or models in the direction of mathematical specialties. Arrange them from high to low recommendation. Explain the reasons for recommendation clearly, and whether you suggest we use basic models to solve the problem and advanced models for verification. Also recommend methods for sensitivity analysis.