When Gretchen returned home for break, she was surprised that her younger sister Eva picked her up from the airport. It was bizarre to conceive of her baby sister, whom she could remember learning to talk, confidently driving a car. When Gretchen got in the car, however, she realized that Eva hadn't really evolved all that significantly. Eva immediately started complaining, as she frequently did, about all of their parents' rules around the house. For the first time, Gretchen suddenly felt above such things, and advised Eva to take it easy on their parents.
How is the theme of the passage revealed?
1 Eva's complaints about her parents' rules communicate the theme of the importance of discipline.
2 Eva's driving a car to get Gretchen from the airport demonstrates the themes of exploration and travel.
3 Eva and Gretchen's contrasting attitudes about complaining convey a theme of growing maturity.