When the editor refused to publish my first article, I was totally disheartened.

Answer: Option B

Displeased : feeling or showing annoyance and displeasure.
Discouraged : having lost confidence or enthusiasm; disheartened.
Dissatisfied : not content or happy with something.
Disturbed : having had the normal pattern or functioning disrupted.
Disheartened : cause (someone) to lose determination or confidence.

Synonym of Disheartened is Discouraged