You find today’s performance of your production database to be the best ever. <br /> Therefore, you want to be notified in the future whenever the performance degrades by 10% of today’s performance. What is the first step that you would take to ensure this?()<img src="https://nimg.ppkao.com/2018-08/wangjing/2018080115465973733.jpg?sign=ea0642e799b2fd046e2c2585c0818415&t=62d35b45" />
A、A
B、B
C、C
D、D
E、E