The correct answers are B and D. AWS Cloud provides the ability to adjust compute capacity on demand, which allows users to scale their resources up or down based on their needs. This feature offers flexibility and can lead to cost savings as users only pay for the resources they actually use. Additionally, AWS offers enhanced security measures, including a variety of security services and features such as encryption, identity and access management, network security, and monitoring. These help secure applications and data, and AWS also provides compliance certifications and best practices for security. Option A is incorrect because no service can guarantee a 100% SLA. Option C is not an advantage as AWS Support does not assist with code development. Option E is incorrect as using AWS Cloud does not inherently increase cost and complexity; in fact, it often reduces them by eliminating the need for on-premises infrastructure and management.