In the code <p class="plain fancy">Hi</p>, what color font will be used?

The code snippet <p class="plain fancy">Hi</p> indicates that there are two classes applied to the paragraph element, namely "plain" and "fancy." If these classes do not have any explicit styles defined in a CSS file or within a <style> tag, the font color will default to the browser's styling for paragraph elements.

In the absence of specific styles for those classes, most web browsers default the text color to black (or another default color based on user settings, but generally black is the standard). Therefore, unless the classes "plain" or "fancy" have associated CSS rules that modify the text color, the text will appear in black.

Thus, in this scenario, selecting that the font color is black is correct based on the conventional styling behavior of HTML paragraphs when no additional CSS rules are applied.