Use the Following Information to Answer Following Questions

Use the following information to answer Following Questions . A 50-year-old man has a body weight of 110 kg, resting heart rate of 90 beats/min, arterial pressure of 120/70 mm Hg, arterial hematocrit of 35% and a normal body temperature. His pressure-volume diagram of the left ventricle is shown below.
-Which of the following will result in a dilated heart?

A) Decreased calcium ions in the blood
B) Decreased magnesium ions in the blood
C) Increased sodium ions in the blood
D) Increased sympathetic stimulation
E) Increased norepinephrine concentration in the blood