Final answer:
The VIPLE execution engine is responsible for thread safety in parallel threads.
The correct answer is C. VIPLE execution engine.
Step-by-step explanation:
Thread safety refers to the ability of a program or system to handle multiple threads accessing shared resources concurrently without causing data inconsistencies or program failures.
In the case of VIPLE, which supports multithreading, it is the responsibility of the VIPLE execution engine to ensure thread safety. The execution engine is responsible for managing and coordinating the execution of different threads, including proper locks and synchronization to prevent issues such as race conditions.
By taking care of thread safety, the VIPLE execution engine allows the application builder to focus on designing and implementing the application logic without having to worry about the low-level details of managing parallel threads.