Question: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

??????????????????????????aredataabstractionsthatprovideanaturalwayofprovidingmutuallyexclusiveaccesstodatasharedamongtasks.
A.
Monitors.
B.
Concurrent Execution.
C.
A semaphore.
D.
Run-time system.

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