A company is managing a customer's application which currently includes a three-tier application configuration. The first tier manages the web instances and is configured in a public subnet. The second layer is the application layer. As part of the application code, the application instances upload large amounts of data to Amazon S3. Currently, the private subnets that the application instances are running for on have a route to a single NAT t2.micro NAT instance. The application, during peak loads, becomes slow and customer uploads from the application to S3 are not completing and taking a long time. Which steps might you take to solve the issue using the most cost efficient method? Choose the correct answer from the options below