Final answer:
MapReduce is a concept that can be used in any parallel computing system, including Hadoop and Cassandra, to process and analyze Big Data efficiently.
The Correct option is;B. can be used in any parallel computing system.
Step-by-step explanation:
MapReduce is a concept that can be used in any parallel computing system. It is a programming model that allows for the processing and analyzing of Big Data by dividing the work into smaller tasks that can be executed in parallel. One of the most well-known implementations of MapReduce is in the Hadoop system, but it can also be used in other systems like Cassandra.
MapReduce is not limited to a specific programming environment like Visual Studio .Net; it can be implemented using various programming languages such as Java and Python. It provides a scalable solution for processing large volumes of data efficiently and is widely used in the field of Big Data analytics.