Answer: B.
Option A is INCORRECT.
Amazon Macie is a fully managed service from AWS that provides data security and privacy by utilizing Amazon's machine learning and pattern matching capabilities.
Option B is CORRECT.
Amazon Detective is a security service that uses machine learning capabilities on the automatically collected log data to help customers perform efficient and fast security investigations.
Option C is INCORRECT.
AWS Artifact is a central resource for all the information about compliance.
AWS artifact provides on-demand access to compliance reports at no additional cost.
Option D is INCORRECT.
Amazon GuardDuty performs continuous monitoring to protect AWS account, S3 data and workloads from any malicious, unauthorized activities.