You need to ensure that if any of the Execute SQL tasks fail, all three tasks will roll back their changes

You are editing a SQL Server Integration Services (SSIS) package that contains three Execute SQL tasksand
no other tasks. The package and all three Execute SQL tasks have their TransactionOption property set to
Supported. You need to ensure that if any of the Execute SQL tasks fail, all three tasks will roll back their
changes. What should you do?

A.
Change the TransactionOption property of the package to Required.

B.
Change the TransactionOption property of all three Execute SQL tasks to Required.

C.
Move the three Execute SQL tasks into a Sequence container.

D.
Move the three Execute SQL tasks into a Foreach Loop container.

Explanation:
According to these references, this answer looks correct.
Reference: http://msdn.microsoft.com/en-us/library/ms137749.aspx
Reference: http://msdn.microsoft.com/en-us/library/microsoft.sqlserver.dts.runtime.dtstransactionoption.aspx