![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
What’s mean of “restricting” signal aspects ?
A.
indicates that the train may proceed at restricted speed.
B.
indicates that the train may proceed.
C.
indicates that the train stop immediately .
D.
indicates that the train should reduce its speed to 35miles per hour and prepare to stop at the next signal.