You are styling a box object on a page by using CSS3.
You need to set the transparency of the object to 50%.
Which two CSS3 styles will achieve the goal? (Each correct answer presents a complete
solution. Choose two.)
A.
Option A
B.
Option B
C.
Option C
D.
Option D
Explanation:
http://www.css3.info/introduction-opacity-rgba/
i think is wrong. Correct is only “C”. opacity make full object transparency, with all inner content. background: rgba make only opacity for background so all content will be not transparency.
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B and C are correct.
B uses RGBA.
C uses RGB plus opacity.
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The RGBA declaration allows you to set opacity (via the Alpha channel) as part of the color value.
Example:
div { background-color: rgba(255,0,0,0.5); }
The background color has been set to blue, and the opacity set to half.
Example 2:
background-color: rgb(0,0,255); opacity: 0.5;
The background color has been set to blue, and the opacity set to half.
Reference: A brief introduction to Opacity and RGBA
480
http://www.css3.info/introduction-opacity-rgba/
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