Glass and Singer (1972)exposed Participants to Bursts of Loud Noise

Glass and Singer (1972) exposed participants to bursts of loud noise while they solved puzzles.Some participants were told that they could turn off the noise by pressing a button.Others were not given this option.Glass and Singer found that:

A) loud noise produced dramatic decreases in task performance in both groups.
B) loud noise increased task performance in the group with the escape option.
C) simply having an escape option reduced the disruptiveness of the loud noise.
D) loud noise increased task performance,but only in the group that actively turned it off.