The ethical imperative that "care must be taken when recycling or destroying electronic devices to avoid contaminating the environment" is associated with _____.

?The _________ declaration sets the left border of a block element to a width of 2 pixels.

Fill in the blank(s) with the appropriate word(s).

To protect yourself against violating copyright, find and use materials that fall under the ____.

A. public domain B. private sphere C. independent range D. creation space