How would the pattern on the screen change if one of the slits were covered?

$($a$)$ The interference pattern would remain unaltered, except for an overall

diminished intensity on the screen.

$($b$)$ All interference effects would no longer appear on the screen.

$($c$)$ The intensity peaks at small angle would be unaltered, but larger angle intensity

modulations would disappear.

$($d$)$ The intensity modulations at small angle would no longer appear, but larger

angle intensity modulations would remain.

$($e$)$ The diffraction peaks would remain at the same angles, but their widths would

become broader.