U$.$S$.$ Customs and Border Protection $($CBP$)$ maintains large, unstructured, transactional databases to fulfill its various border security and law enforcement missions. In order to understand and visualize patterns and anomalies within existing datasets, CBP has deployed Enterprise Analytics, a collection of information technologies and tools, known as CBP$-$EA$,$ using internal datasets and other data sources in support of CBP$$s border security and law enforcement missions. CBP$-$EA allows CBP to analyze and interpret existing data more effectively without changing the data in the source databases.

From the information given above, it can be validly concluded that

A$)$

in at least a large number of cases, the system known as CBP$-$EA will serve to analyze and interpret existing databases without introducing any changes in them

B$)$

if a system is not the CBP$-$EA$,$ then it could not possibly serve to analyze existing databases or to do so without changing them

C$)$

there are some systems other than the CBP$-$EA that serve the purpose of analyzing and interpreting existing databases without introducing any changes in them

D$)$

there are cases in which the CBP$-$EA will not serve the purpose of analyzing and interpreting existing databases and in which the system will fail to leave the databases unchanged

E$)$

in all cases, the CBP$-$EA will serve to analyze and interpret existing databases but will not necessarily be able to avoid producing changes in them