An end user cannot log in to a page that provides an c-learning course. The authentication
window will not launch. Which of the following is most likely the cause of this problem?

A.
The browser has recently had its cookie cache cleared.

B.
The browser has recently had its browsing history cleared.

C.
Pop-up blocking software has been enabled in the operating system.

D.
Pop-up blocking software has been enabled in the Web browser.

Explanation: