Answer:
https://scoringguides.airast.org › ...PDF
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Grade 7 - AIR Scoring Guides
I believe the answer is B
Wings- where the actors wait to go on stage
Sound booth- where the tech people deal with any audio or music
Pit- where a band might play during a performance
Prop room- where the props that aren’t used in the show are stored
Community hall- where the viewers wait for the show before sitting down, or after the show
Fly tower- used to quickly fly props, scenery, and actors
Trap room- an open space used for scenic effect
C is the answer you are looking for
Answer A makes sense for me
the other sentence is B therefore
because therefore means so
my teacher was very ill therefore (so) a substitute was called to finish the day