Learning the lighting desk

Source A: an original contemporary non-fiction-style account.

The community theatre needed somebody to operate its lighting desk for a children's play, and I offered to learn. On Monday evening the technician showed me how the numbered sliders controlled different lamps. We rehearsed without the actors first. My task was to follow a list of cues marked in the script, not invent effects whenever the stage looked too dark. A red pencil line showed where the first lighting change belonged.

At the full rehearsal on Thursday, I missed that cue because I was watching a costume being adjusted in the wings. The technician stopped me and suggested keeping a finger beside the next instruction. This simple habit helped. I still wrote a reminder above one difficult change: wait until the door closes. Before leaving, I saved the settings and covered the desk. The performance would be on Saturday, with the technician sitting beside me for the opening scene. Knowing she would be there made the unfamiliar controls look slightly less like an examination.

Refer to the whole of Source A. Choose the four true statements below. Write their four letters in the answer box. Choose no more than four; if more are given, only the first four distinct letters will be marked.