# obtain a single matrix whose column space has B = { (1, 1, 0, 0), (9, 1, 0, 1)}

obtain a single matrix whose column space has $B=\left(1,1,0,0\right),\left(9,1,0,1\right)$
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timbalemX
Presumably those are supposed to be column matrices. In that case, the obvious choice is
$\left[1,1,0,0,9,1,0,1\right]$
as you can tell at a glance that both vectors in BB are elements of the span of the columns.