After Being Assaulted by Her Boyfriend, an 18-Year-Old Female Who

After being assaulted by her boyfriend, an 18-year-old female who is 33 weeks pregnant is found unresponsive in her bedroom. She appears to have been beaten in the head and abdomen as evidenced by multiple hematomas and lacerations to these areas. Which assessment finding should concern the EMT most and be addressed first?

A) Rapid heart rate
B) Bright red vaginal bleeding
C) Abdominal contusions
D) Room air SpO₂ at 93%