BOX$-$SIZING: BORDER$-$BOX; is applied to some INPUT elements to which the "form$-$fields" class is applied in the CSS code for the form. What's the main purpose of that declaration? $($note: This is one we covered in CSIS $132,$ but you can easily find the answer by googling$).$

Group of answer choices

It's used to fix the $"$CSS box model problem" such that PADDING and BORDER values don't affect element WIDTH settings

It's used to create a "border box," which has standard widths for desktop, tablet and phone sized viewports