Which of the followi

Which of the following is a valid CRS deployment scenario?（）

• ACRS 4.0 running with Cisco Unified CallManager 4.0  
• BCRS 4.1 running with Cisco Unified CallManager 4.1  
• CCRS 4.0 running with Cisco Unified CallManager 4.1  
• DCRS 3.5 running with Cisco Unified CallManager 3.3