What is meant by the phrase "SAPUI5 supports modification free enhancements"?

What is meant by the phrase "SAPUI5 supports modification free enhancements"?
A . SAP provides a service in the cloud to generate an enhanced application using aspect-oriented programming.
B . The developer must create a copy of the application that should be enhanced and the enhancement is done in the copy.
C . The delivered standard application remains unchanged and hence the extension is considered to be modification free.

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Answer: C