Answer:
d. to provide a moral lesson
Step-by-step explanation:
The excerpt gives some teaching to the readers. If a person wants to pass unnoticed in a situation, he / she should be silent. If he / she speaks, his / her words will give him / her away. This person can change his / her appearance , but his / her words naturally belong to him / her. The message is :" You can decieve someone through your appearance but you will never decieve someone through your words".