Question

Answer 1

28 No, they aren't

29 Because they often choose faster cars with bigger engines

30 When they have their friends in th car

31 No, they don't

Answer 2

II. 

28. No, they aren't. They are the most likely to have an accident 

29. Because they often choose faster cars with bigger engines

30. When they have their friends in the car

31. No, they don't. They drive more slowly and safely when their small children are riding in the car