Which Hadoop components can be consolidated onto the Isilon cluster to reduce the footprint?

A company wants to reduce the footprint in their data center. They recently completed a proof of concept with Hadoop using Direct Attached Storage (DAS) for their Big Data initiative. You have determined that incorporating an Isilon cluster into their Hadoop environment would help in reducing this footprint.

Which Hadoop components can be consolidated onto the Isilon cluster to reduce the footprint?
A . DataNode and NameNode
B . DataNode and ComputeNode
C . ComputeNode and NameNode
D . NameNode and TaskTracker

Answer: A