Your company is in the process of developing a cutting-edge e-commerce platform aimed at operating on a global scale. The platform is expected to experience significant traffic surges during peak shopping events such as Black Friday and Christmas. To ensure a seamless shopping experience for users worldwide, the platform must achieve high availability, scalability, and optimal performance across various geographic regions. Moreover, the solution needs to be cost-effective, avoiding superfluous expenditures during periods of low traffic. Given these requirements, which of the following Azure cloud service features should you prioritize to meet the platform's needs? (Choose two options from A to D)