4. Lines 84–88: In what way might the speaker be considered an expert about teenage driving? Why does the author end this section of the article with her quotation?

Unclear question. Inferred you are referring to the USAToday article "Experts say teen drivers need more practice."

Explanation:

1. Her comments about parents emphasizing the wrong skills, such as parallel parking instead of teaching their teens to learn to scan the road ahead for hazards, shows her expertise.

2. She ends with this quotation;

"It's about knowing the person you are going to get in the car with," he said. "If you know they are irresponsible, you shouldn't get into the car with them." This is done to show her support for the sincere advice from a teenage driver himself.