Its D) because scientist focuses on how this happened and why.. so its D)
D) A baby has around 306 bones.
The skeleton of the baby is made up of mostly cartilage. Most of this turns into bone as the baby develops and by adulthood, the skeleton has only 206 bones.
In 1950, Syngman Rhee boasted that he was going to attack North Korea. It was a good enough excuse- the North Koreans invaded South Korea. This started the actual fighting.
Sorry it doesn't quite answer your question.<span />
<span>The Congress of Vienna</span>