You are creating a CSS Grid layout with a header, main content area, sidebar, and footer, You want the main content area to take up two columns

How would you make the main content area with the ID main$-$content span two columns in the grid layout?

SELECT ONLY ONE

#nain$-$content grid$-$cotunn$-$start: spa$\frac{n}{2}$; $)$

Hmain$-$content I grid$-$column$-$end: spa$\frac{n}{2}$;

Amain$-$content $\{$ grid$-$columa: span $2$ ; $\}$

#tain$-$content if grid$-$colunn$-$span: $2$; r