Answer: Reserved Instances, Savings Plans

## Explanation **Reserved Instances (C)** and **Savings Plans (D)** are the correct answers because: ### Reserved Instances (RIs) - Allow you to make an **upfront commitment** (1-year or 3-year term) for EC2 instance usage - Provide **significant discounts** (up to 72% compared to On-Demand pricing) - Are specifically designed for **production workloads** with predictable usage patterns ### Savings Plans - Offer **flexible pricing model** with upfront commitment - Provide **similar discounts** to Reserved Instances (up to 72% savings) - Cover **broader range of services** beyond just EC2 instances - Offer more **flexibility** in instance family, size, and region changes ### Why other options are incorrect: - **Spot Instances (A)**: Offer the lowest cost but don't require upfront commitment and can be interrupted - **On-Demand Instances (B)**: No upfront commitment required, highest cost option - **Dedicated Hosts (E)**: Physical servers dedicated to your use, but typically more expensive and don't specifically offer the lowest cost for production workloads Both Reserved Instances and Savings Plans provide the **lowest cost** for production workloads when you can make an upfront commitment for continued usage.

Author: Ritesh Yadav