Answer:
20) false he was killed a couple days after the civil war ended
21) actor John Wilkes Booth
do you mean standard position and initial and terminal side
The correct answer to this question is letter ". C) The comma attempts to separate a compound predicate."
The first part of the sentence is the predicate, so it's not trying to separate a subject.
"Then skylights that were made of aluminum siding" isn't a sentence, so it's not an independent clause."
