Occurs when multiple processes or threads read and write data items so
that the final result depends on the order of execution of instructions in the multiple processes.
a. race condition
c. mutual exclusion
b. exception
d. interrupt

That would be a race condition. This occurs when multiple processes or threads try to access the same memory at the same time. To remedy this you would want to use a mutex or semaphore to lock certain areas of memory to only a single thread or process at a given time.

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