Which of the following is a vulnerability associated with disabling pop-up blockers?

A.
An alert message from the administrator may not be visible

B.
A form submitted by the user may not open

C.
The help window may not be displayed

D.
Another browser instance may execute malicious code

Explanation:
Pop-up blockers prevent websites from opening new browser windows without the users consent. These are often used for advertisements but can also be used to
distribute malicious code.
Incorrect Answers:
A, B, C: Pop-up windows are browser windows that are opened without the consent of the user.
They are not alert messages, forms or the help window.

Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, p 246 Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study
Guide, Sixth Edition, Sybex, Indianapolis, 2014, p 222