Problem: Read the following selection and then answer the question. (1) Getting a driver's license is one of the most anticipated rites of passage for teenagers-and for parents, who no longer have to chauffeur their teens around. (2) Currently, the age at which teens can drive unsupervised ranges from fourteen to seventeen years old. (3) The Insurance Institute for Highway Safety (IIHS) said U.S. states should make a U-turn on driving ages to save lives. (4) The group suggests raising the age for getting a license to seventeen or even eighteen. (5) The idea warrants serious consideration, if it actually reduces car crashes, the leading cause of death among teenagers. (6) More research seems a reasonable next step. Which sentence contains an explicit transition to the author's opinion?
Sentence 1
Sentence 2
Sentence 5
Sentence 6