Question: In spark programing we should run Action operations on RDDs like collect ( ) when A . the processing pipeline ends and we want to

In spark programing we should run Action operations on RDDs like collect() when
A.
the processing pipeline ends and we want to get to store very large results.
B.
when we want to pass very large data sets to the next processing step.
C.
we want to get the results and we know that the result is small enough to fit into a single machine memory.
D.
All of the above cases

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