There are two types of expressions of phrasal verbs.
The correct answer choices are:
Atkinson unsuccessfully tries to stab the narrator.
And-
The clock strikes midnight while Withencroft is still writing.
I would have to say C.) Shot open. because it let's the reader immediately know she is scared. Therefore giving you the tone of the passage.
Answer:
You could get two 'complete' sentences without the connection.
I guess I like your teacher for the Sonic reference.