Progress Quiz
We've covered a lot of ground! Let's take a moment for a review question. What's an important advantage of using servlets?

	Servlets provide secure connections to the back-tier with more control than previous applications and may use native security features.
	It's easier to build sophisticated applications in a minimal amount of time.
	Servlets execute and remain in memory. Since they incur load overhead only once, system performance is better.
	Use of servlets permits exploiting the Java component model, JavaBeans.
	All of the above.