Final answer:
Maggie is safety-conscious, resourceful, and budget-aware according to the excerpt provided.
Step-by-step explanation:
The statement that best expresses an inference that can be made about Maggie's character from the given excerpt is that Maggie is concerned about safety and is proactive. This is evident from her decision to leave Los Angeles after hearing about the accident at the Greenston Nuclear Plant. The text also suggests that Maggie is resourceful and focused, as indicated by her assurance that she is doing the right thing and her attention to the countryside, which made her forget to buy gas. Lastly, the interaction at the gas station shows Maggie is budget-conscious, as she inquires about the price difference for self-service.