View the Exhibit that sets the threshold for the Current Open Cursors Count metric.Why is the Significance Level threshold type not available in the threshold setting?()<br /> <img src="https://nimg.ppkao.com/2018-08/yiyu/2018080211122348933.jpg?sign=d16331106fcf28ac9c416d52b6445e2e&t=62d180a6" />
A、because AWR baseline is not enabled
B、because Current Open Cursors Count is not a basic metric
C、because the STATISTICS_LEVEL parameter is set to BASIC
D、because the AWR baseline is a system-defined moving window baseline