You are the IT professional who work in an International company named Wiikigo. You are experienced in troubleshooting operating systems and applications that are not working correctly, identifying code defects and so on. You have enough knowledge on windows internals and you provide technical support for the company. For Windows XP, a device driver is created by you. This device driver runs on uniprocessor systems only. A system thread and a deferred procedure call (DPC) are created by the driver. The DPC is invoked by a repeating timer. Both the thread and the DPC must process entries from the same work queue. You must make sure that the system thread and the DPC are synchronized. Which IRQ Level (IRQL) should be used?

A.
LOW_LEVEL should be used.

B.
APC_LEVEL should be used.

C.
PASSIVE_LEVEL should be used.

D.
DISPATCH_LEVEL should be used.