Final answer:
Davey might express the need to hurry home because their parents were waiting for them.
Step-by-step explanation:
The reason why Davey expressed the need to hurry home can be inferred from the given information. In the text, Amy mentioned that she had wasted two hours at the movies and knew that at home, they were waiting for her. From this, we can conclude that Davey might express the need to hurry home because their parents were waiting for them, which is option b) in the given options. It's important to note that the given information does not directly state the reason, but through inference, we can determine the most likely answer.