Answer:
This quote adds credibility to the text because it is a personal account of a person who witnessed that moment.
Step-by-step explanation:
The text above shows how immigrants were treated when they tried to reach the USA and how complicated, delicate and neglected their situations were by immigration taxes. However, the storyteller is reporting a personal moment where violence against immigrants was imposed on his family. As the narrator is reporting a moment that he lived, this quote has great credibility.