Marshall's computer previously contracted malware because he unknowingly clicked on an infected link in a pop-up window. What can he do to secure the Web browser so that he is protected in the future?

• A.Disable cookies in the Web browser
• B.Enable the pop-up blocker
• C.Install anti-virus software
• D.Install the latest beta update for the Web browser

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Which of the following is a true statement regarding the relationship between Promises and callback functions?

• A.A Promise is an object a developer can use to pass callbacks to functions.
• B.A Promise is a returned object to which the developer can attach callbacks instead of passing callbacks to a function.
• C.A Promise cannot be used in conjunction with a callback.
• D.A Promise is used to monitor the value of a variable A callback retrieves the previous value of a variable.

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