You are a Machine Learning Engineer working on a project that involves deploying a complex model on Vertex AI, Google Cloud's managed ML platform. Your team is particularly interested in understanding the model's decision-making process by identifying the most influential features and their impact. Vertex Explainable AI offers several methods for feature attribution to achieve this. Considering the need for accuracy, scalability, and compliance with industry standards, which three methods does Vertex AI employ for feature attributions? Choose the three correct options.