The reason why E doesn't help is because E requires us to go one more step to explain why people aren't wearing seat belts?(because they are not obeying the law?)
http://7sage.com/lsat_explanations/lsat-37-section-2-question-17/
... very confused with this specific question, one of the few ... . It's a weaken question but the correct answer choice ... think to deeply into this question and miss the obvious answer ...