The three unpaired arteries emerging from the descending abdominal aorta to supply the gastrointestinal tract are the:
a) Celiac trunk, superior mesenteric artery, and inferior mesenteric artery
b) Celiac trunk, renal artery, and superior mesenteric artery
c) Superior mesenteric artery, inferior mesenteric artery, and renal artery
d) Inferior mesenteric artery, celiac trunk, and gonadal artery