Over the Past Week, Every Time Larry Has Started His

Over the past week, every time Larry has started his computer, he has noticed that the time is not correct. Larry didn't consider this a problem because his computer was working properly. However, now Larry has decided that he should investigate why the time is not accurate.
What can you tell Larry to check to find out why the clock does not keep the right time?

A) POST is failing.
B) The internal time clock is malfunctioning.
C) The motherboard is going bad and needs to be replaced.
D) The CMOS battery is bad and needs to be replaced.