Finish the lyric

i gotta know you feel it
what do you see when you close your eyes
'cause you are on _

The most basic method for controlling horizontal sway is to simply tighten up the structure. at the point where the horizontal girders attach to the vertical column, the construction crew bolts and welds them on the top and bottom, as well as the side. this makes the entire steel super structure move more as one unit, like a pole, as opposed to a flexible skeleton.

The answer is a and c