The woman's problem is that she's forgotten to rent a van for her volunteer work. She's supposed to take several elementary kids to the zoo after school. She has the option of renting two cars can borrow two cars and find a volunteer driver or take the public transport. I prefer borrowing renting cars. Because as it is private cars are safer for the kids and more convenient, despite the difficulty in borrowing renting cars and finding a volunteer. In On the other hand, it's more difficult to supervise those kids children ('kids' is informal) on public transport and they could go missing at the stops, although it saves the trouble borrowing renting cars.

It's ideal to use 'renting' instead of 'borrowing'