Microsoft Sentinel is Azure's native cloud SIEM and SOAR solution, designed specifically for security information and event management along with security orchestration, automation, and response capabilities. The community discussion shows 100% consensus on option B, with detailed explanations confirming that Microsoft Sentinel provides both SIEM (collecting and analyzing security data across the enterprise) and SOAR (automating security responses) functionality. Azure Analysis Services is for business intelligence analytics, Azure Information Protection is for data classification and protection, and Azure Cognitive Services provides AI/ML capabilities - none of these are SIEM/SOAR solutions.