Which of the sentences is correct?
While she was doing so, rattling the grate bars and clattering the lids.
While she was doing so, rattling the grate bar and clattering the lids.
While she was doing so, rattling the bar grate and clattering the grate bars and clattering the lids.
While she was doing so, rattling the the bar's grate and clattering the lids.