Progressively enhancing a web page for different viewing contexts (such as smartphones and tablets) through the use of coding techniques is called

a. optimization
b. responsive web design
c. mobile web design
d. fixed web design

responsive web design

Explanation:

Responsive web design is the way web designers make web page scale into different screen sizes, layouts and orientations and this is usually achieved by the combination of one or more of the following : coding techniques, flexible images, CSS libraries and CSS media queries etc.

answer; i believe the correct answer is (psychological pricing);

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explanation:

ya know cuaass i dont mno