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You have been troubleshooting a performance issue with a system that has just had a new block device installed along with its driver. The driver code was written by a new software development intern. When the device is accessed , you notice high CPU utilization. Which of the following is the most likely solution to the problem? a. add a FIFO chip to the device
b. change the device to use character streaming
c. use DMA to perform data transfers
d. use programmed I/O to communicate with device registers

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