Which of the following is one of the most effective ways to prevent Cross-site Scripting (XSS) flaws in software applications?

Which of the following is one of the most effective ways to prevent Cross-site Scripting (XSS) flaws in software applications?
A . Use security policies and procedures to define and implement proper security settings.
B . Use digital certificates to authenticate a server prior to sending data
C . Validate and escape all information sent to a server.
D . Verify access right before allowing access to protected information and Ul controls.

Answer: C