What standard made up the project processes that were eventually integrated into the ISO 12207-1995 standard?

If the paragraph element's margin-top value is 15px and margin-bottom value is 25px, the browser sets the vertical margin between paragraphs to ____ pixels.

A. 10 B. 15 C. 25 D. 40

To accommodate responsive design, you add CSS style rules to ____________________ that correspond to the mobile, tablet, and desktop viewports.

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