Compound fracture is a serious injury in which the broken bone tears the skin. So in compound fracture as bone tears the skin from inside in cause lots of bleeding and the open wound which makes the site of fracture vulnerable for infections.
More the damage to the bone and soft tissue more will be the chances of infection. If the bone gets the infection then it is more difficult to treat it and lots of antibiotics and multiple surgeries could be required to treat the fracture and infection. In some cases, it can become life-threatening. So the correct answer is B.
Answer: The automatic response to tensing your muscles after you hear the sound of the clanking the rollercoaster makes is an example of the phrase pavlov's dogs, which can refer to classical conditioning because it refers to the habit of automatic response to a stimulus.
