Answer: where is the question?
He made plans to wreck the party.
Had she known, she would've acted differently.
The knight drew his sword, preparing for battle.
Since this drawing is his way of reminding her that she and their garden are "as safe as a missel thrush", it makes her one of the many creatures whose secrets he keeps faithfully. So, having that in mind, I would say the correct answer is A) his trustworthiness.
John's choices influenced the plot and end of story because of the choices been made of John.