You need to add the new capability to all the packages without copying the code between packages

You are adding a new capability to several dozen SQL Server Integration Services (SSIS) packages. The new
capability is not available as an SSIS task. Each package must be extended with the same new capability. You
need to add the new capability to all the packages without copying the code between packages. What should
you do?

A.
Use the Expression task.

B.
Use the Script component.

C.
Use the Script task.

D.
Develop a custom task.

E.
Develop a custom component.

Explanation:
According to these references, this answer looks correct.
References:
http://msdn.microsoft.com/en-us/library/ms135965.aspx
http://msdn.microsoft.com/en-us/library/ms345161.aspx