All 4 contributed, but B and D are the most direct causes.
The limits of genomic testing are connected with tracking the possibilities of developing a certain disease. It used to be believed that genes were the most importan responsible factors for causing self-immune diseases, but now it has been prooved that the environment, bad habits and nourishing, among other factors, play a more important role in that aspect.
<span>The Karanga were traders and sailors who smelted gold and traded it on the shores of the Indian Ocean in exchange for glass beads and porcelain.</span>
B. became an international war when Hitler and Mussolini sent men and equipment to aid Franco.