To ensure that the timing and performance data of your web application is gathered and only made available to users when they are logged on the web server, which code should you add to the Web.config file?

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Question:
To ensure that the timing and performance data of your web application is gathered and only made available to users when they are logged on the web server, which code should you add to the Web.config file?

1.<compilation debug="true" urlLinePragmas="false"> ... </compilation>

2.<trace enabled="false" pageOutput="true" localOnly="false" />

3.<trace enabled="true" pageOutput="false" localOnly="true" />

4.<compilation debug="false" urlLinePragmas="true"> ... </compilation>

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