Which sentence uses brackets correctly? since the speaker is going mad, i wonder if it [the raven] is actually perched above the door. since the speaker is going mad, i wonder if [it the raven] is actually perched above the door. [since the speaker is going mad], i wonder if it the raven is actually perched above the door. since the speaker is going mad, [i wonder if] it the raven is actually perched above the door.