Answer: C and E
Option A is INCORRECT because 24*7 technical support via phone, email, and chat access to Cloud Support Engineers is not available in Basic Plan.
Option B is INCORRECT because 24*7 technical support via phone, email, and chat access to Cloud Support Engineers is not available in the Developer Plan.
Option C is CORRECT.24*7 technical support via phone, email, and chat access to Cloud Support Engineers is available in Business Plan.
Option D is INCORRECT. There is no Premium plan.
Option E is CORRECT. 24*7 technical support via phone, email, and chat access to Cloud Support Engineers is available in Enterprise Plan.
Reference:
https://aws.amazon.com/premiumsupport/plans/