Answer:
B. Infectious mononucleosis.
Step-by-step explanation:
Splenic enlargement is why when you have mono you're on bedrest & have to avoid activities like sports...so you don't rupture your spleen.
A. Eating before competition wouldn't affect your spleen
C. Hematuria is blood in your urine, so that would be kidneys/bladder
D. Cirrhosis involves your liver.