Which choice defines the term isolation when used to describe the properties of a transaction?

A.
Isolation guarantees that a transaction will either result in a new valid system, or the system will
be restored to its original state.

B.
Isolation guarantees that a committed transaction will persist despite any type of system failure.

C.
Isolation guarantees that logically related operations are dealt with as a single unit.

D.
Isolation guarantees that transactions running at the same time will not have access to each
others partial results.