Which new feature of CSS 3 makes it possible to adjust the transparency of the elements?ARounded cornersBBorder ImagesCBox shadowDOpacity

Break Down the Problem

1. Identify the features listed in the question.
2. Determine which feature pertains to adjusting transparency.

Relevant Concepts

1. CSS3 Features:
   • Rounded Corners: Achieved using the border-radius property.
   • Border Images: Used for images as borders around elements.
   • Box Shadow: Allows adding shadow effects to elements.
   • Opacity: A property used to control the transparency level of elements.

Analysis and Detail

Opacity is a CSS3 property that adjusts the transparency of an element. It takes values from 0 (completely transparent) to 1 (completely opaque), thereby allowing designers to create visual effects by layering elements with varying transparency.

Verify and Summarize

Given the explanations and definitions of each option, the feature that directly deals with transparency is Opacity.

Final Answer

The new feature of CSS 3 that makes it possible to adjust the transparency of the elements is D. Opacity.