Developing and building applications for Apple's iOS platform requires the macOS operating system and the Xcode development environment. Amazon EC2 Mac instances are the only service among the options that provide on-demand macOS environments in the AWS Cloud. These instances run on genuine Apple Mac hardware (like the M1 Mac mini) and are designed specifically for developers to build, test, package, and sign applications for Apple platforms, including iOS, iPadOS, and macOS. This directly addresses the company's need to move its iOS development and build activities to AWS.

A. AWS CodeCommit is a managed source control service for hosting private Git repositories. It stores code but does not provide the computational environment needed to build it.
C. AWS Amplify is a development framework and set of tools for building web and mobile backends. While it can be used with an iOS app, it does not provide the required macOS build environment.
D. AWS App Runner is a fully managed service for deploying containerized web applications and APIs. It is not designed for building native mobile applications like those for iOS.

1. Amazon EC2 Mac instances Documentation: "Amazon EC2 Mac instances allow you to run on-demand macOS workloads in the cloud... With EC2 Mac instances

you can... build

test

package

and sign Xcode applications for the Apple platform including macOS

iOS

iPadOS

tvOS

watchOS

and Safari."

Source: AWS Documentation

"Amazon EC2 Mac instances

" Product Details section.

2. AWS CodeCommit User Guide: "AWS CodeCommit is a version control service hosted by Amazon Web Services that you can use to privately store and manage assets (such as documents

source code

and binary files) in the cloud."

Source: AWS Documentation

AWS CodeCommit User Guide

"What is AWS CodeCommit?

" Introduction.

3. AWS App Runner Developer Guide: "AWS App Runner is an AWS service that provides a fast

simple

and cost-effective way to deploy from source code or a container image directly to a scalable and secure web application."

Source: AWS Documentation

AWS App Runner Developer Guide

"What is AWS App Runner?

" Introduction.

4. AWS Amplify Documentation: "AWS Amplify is a complete solution that lets frontend web and mobile developers easily build

ship

and host full-stack applications on AWS..."

Source: AWS Documentation

AWS Amplify Docs

"What is AWS Amplify?

" Overview.