Answer: 2. Motor vehicle or motorcycle crashes
Step-by-step explanation:
Blunt trauma is the initial trauma from which more common forms arise such as abrasions, l, contusions, acerations, internal bleeding and/or bone fractures.
It can quickly lead to exsanguination, hemorrhagic or hypovolemic shock, and death if penetrating trauma occurs in blood vessels close to the heart. Another source of vascular damage that can lead to internal bleeding is blunt trauma. This can happen in an automotive crash following a high speed deceleration.
Several motor vehicle or motorcycle crashes causes internal bleeding in abdominal cavity which damages ribs as well.
Hence, the correct option is 2. Motor vehicle or motorcycle crashes.