You maintain a SQL Server Integration Services (SSIS) package. The package was developed by using SQL Server 2008 Business Intelligence Development Studio (BIDS). The package includes custom scripts that must be upgraded. You need to upgrade the package to SQL Server 2012. Which tool should you use?
A. SQL Server Configuration Manager
B. SQL Server Agent
C. SSIS Upgrade Wizard in SQL Server Management Studio
D. SQL Server DTExecUI utility (dtexecui.exe)