both you would write it like this, ''Get the cat!" Jerry yelled.
One cause, (forgot to set alarm clock) & many effects in result ( missed bus, arrived late for school, and missed math test)
One cause- all because of forgetting to set the alarm clock. Thus, many effects.
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The final lecture in which Julian gave to her mother ironically applies more to him than his mother. It is because his mother's death was the least expected thing to happen yet it happen therefore Julian needs to accept it and face the new world without his mother.