Question: ou are initiating an MPI program with the command mpirun - n 4 . / myprog . What does the call to MPI _

ou are initiating an MPI program with the command "mpirun -n 4./myprog". What does the call to MPI_Init do?
Create 4 parallel processes
Start program execution
Enable the 4 independent programs subsequently to communicate with each other
Create 4 parallel threads

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