Answer: Parallel conversion
Step-by-step explanation:
The parallel conversion is the process in which the various types of operations are get transferred from one computer system to other system.
In the process of parallel conversion, both the computer system are run for the same period of time and it ensure that the both the systems are producing the similar results at that point of time.
This type of conversion is basically used in an organizations for converting the old system into the new system.
Therefore, Parallel conversion is the correct answer.