Final answer:
The best explanation for Jia's behavior is that the cookies were too tempting for her, so she had to go after them.
Step-by-step explanation:
The best explanation for Jia's behavior is that the cookies were too tempting for Jia, so she had to go after them. Temptation is a strong force, especially for a child, and Jia couldn't resist the lure of the cookies despite her mother's instructions. It's important for children to learn self-control and follow instructions, but in this case, Jia's desire for cookies overpowered her ability to wait.