Read the following context and choose the best option to answer the question.
Context: I calmly walked back over pounded on the window six times and waited , I even called out " Stephen are you all right . " He knows you can see through the blinds up close , but she did n't . I saw him get up , get dressed and then the next thing I know he is opening the front door , so I walk over to meet him .
Question: Why did I knock on the glass ?
Options: 
- To make sure it was locked .
 - None of the above choices .
 - To see if it was sturdy .
 - To loosen it for refitting .


None of the above choices .