How do the boys’ attitudes before the presentation compare to their attitudes after it?

They do not have much respect for their principal before the presentation, but afterward they appreciate her.
They do not have any interest in attending college before the presentation, but afterward they do.
They do not like spending time in the library before the presentation, but afterward they decide to study there.
They do not recognize that they are being given a great opportunity before the presentation, but afterward they do.