单选题A user needs a laptop keyboard replaced because the space bar is not working. Mike, a technician, replaces the keyboard, and notices that a diagonal set of keys will not respond. Which of the following is the MOST likely cause?（）AStickyKeys is enabled and needs to be disabled.BThe new keyboard is defective and needs to be replaced.CThe system board is defective.DThe keyboard ribbon is not seated properly.
单选题
A user needs a laptop keyboard replaced because the space bar is not working. Mike, a technician, replaces the keyboard, and notices that a diagonal set of keys will not respond. Which of the following is the MOST likely cause?（）
A
StickyKeys is enabled and needs to be disabled.
B
The new keyboard is defective and needs to be replaced.
C
The system board is defective.
D
The keyboard ribbon is not seated properly.
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