What is the width of any div elements on a 350px screen given the following CSS rules: div { width: 80%; }?

The width of the div elements is set to 80% in the CSS rule. This means that the width is calculated as a percentage of the total width of the containing element, which in this case is the screen width of 350px. When you apply the percentage, you calculate 80% of 350px.

To find the actual width in pixels, you can perform the calculation:

80% of 350px = 0.8 * 350px = 280px.

Therefore, the div elements will occupy a width of 280 pixels on a screen that is 350 pixels wide. Since the question asks for the width as defined by the given CSS rules rather than its pixel value, stating the width in percentage terms directly corresponds to the CSS rule, which is 80%. Thus, the correct answer is that the width of the div elements is 80%.