You run Windows Defender on your computer and receive the following warning message: "Windows Defender Definitions haven’t been updated."<br /> You need to ensure that Windows Defender definition files are updated.<br /> What should you do?()<br /> <img src="https://nimg.ppkao.com/2018-07/gelingxia/201807311457562530.jpg?sign=aaaf9312bcd7461ac3748bfb4d228780&t=62d02d2e" />
A、A
B、B
C、C
D、D