Which AWS service provides managed DNS and domain registration?

Correct answer: Amazon Route 53

Option A is correct because Amazon Route 53 is AWS's scalable cloud DNS service that also supports domain registration, health checking, and traffic routing policies, making it the single managed service for both DNS and domain registration on AWS. Option B is wrong because Amazon VPC is a virtual private cloud networking service for isolating resources within AWS; it does not provide DNS management or domain registration. Option C is wrong because Amazon API Gateway is a service for creating, publishing, and securing APIs; it has no DNS or domain registration functionality. Option D is wrong because AWS Direct Connect provides dedicated private network connections from on-premises data centers to AWS; it is a connectivity service, not a DNS or domain registration service.