A 32-year-old male presents to the emergency department after a motor vehicle collision. He complains of left upper quadrant abdominal pain and has bruising over the left lower chest. His vital signs reveal hypotension and tachycardia. Which solid organ is most likely injured, and what is the initial management priority?
Liver; Perform an immediate laparotomy
Kidney; Administer pain control and prepare for dialysis
Pancreas; Start antibiotics and obtain an emergency CT scan
Spleen; Initiate fluid resuscitation and monitor hemodynamic status