Under What Circumstance Would Your Body Experience an Increase in Erythropoietin

Under what circumstance would your body experience an increase in erythropoietin secretion?

A) after drinking 5 liters of water in just 2 hours
B) if you are suffering from dehydration
C) if you are suffering from hypertension
D) if you just moved from New York City to start training for a marathon in the 'Mile-High' city of Denver, Colorado
E) if your hematocrit is elevated above normal levels