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You are a Machine Learning Engineer at a rapidly growing e-commerce company. Your team has developed a Keras-based proof-of-concept model for product recommendation, currently in a Jupyter notebook. The notebook includes steps for data validation, model analysis, and training. With the anticipation of increasing training data volume, your manager has tasked you with productionizing this model. The solution must automate weekly retraining, scale efficiently with growing data, and minimize costs by leveraging Google Cloud's managed services. Additionally, the solution should ensure reproducibility and ease of maintenance. Which of the following approaches best meets these requirements? (Choose two options if E is available)