Final answer:
B. False
External contusions and abrasions of the abdominal wall are not direct signs of blunt uterine trauma; they only suggest the possibility of underlying injuries, and further evaluation is needed to diagnose uterine trauma.
Step-by-step explanation:
The statement that external contusions and abrasions of the abdominal wall are signs of blunt uterine trauma is false. External injuries to the abdominal wall can suggest trauma to underlying structures, including the uterus, especially in the context of a pregnant individual. However, these signs do not directly correlate with uterine injuries. Diagnosis of uterine trauma typically involves imaging studies and clinical evaluation, particularly in the case of pregnant patients where fetal monitoring is critical.