Question: Which of the following is true about parallel program execution? The load imbalance does not cause a situation where some subtasks may end up waiting

Which of the following is true about parallel program execution?
The load imbalance does not cause a situation where some subtasks may end up waiting for data from other subtasks to proceed.
As a result of the load imbalance, some subtasks may complete later than other tasks.
Synchronization during execution is always possible.
As a result of the load imbalance, some subtasks may end up waiting for data from other subtasks to proceed.

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