Basic
Basic is free, but technical support engineer inquiries are not included; it centers on customer service, documentation, and forums.
It does not provide 24/7 technical support, so it is incorrect.
When a problem occurs in your production workload, you want to be able to contact a technical support engineer 24/7 by phone, chat, or email. Which is the lowest-cost support plan that meets this?
Choosing the lowest-cost support plan that provides 24/7 technical support.
Basic
Basic is free, but technical support engineer inquiries are not included; it centers on customer service, documentation, and forums.
It does not provide 24/7 technical support, so it is incorrect.
Developer
Developer centers on email (chat) support during business hours, and does not include 24/7 phone support.
It does not meet the requirement for always-on technical support, so it is incorrect.
Business
Correct. The Business plan is the lowest-cost plan that lets you contact a technical support engineer 24/7 by phone, chat, and email. It is aimed at companies running production workloads and also provides all Trusted Advisor checks.
No support plan is needed (no support at all).
AWS has several support plans, and choosing the right one gives you technical support.
The statement that no support is available at all is wrong, so it is incorrect.
24/7 phone and chat technical support and all Trusted Advisor checks start from Business. Basic has no technical support, and Developer is business hours only. The 'lowest plan for 24/7 technical support' is Business.