Most of the people who appear most often and most gloriously in the history books are great conquerors and generals and soldiers, whereas the people who really helped civilization forward are often never mentioned at all. We do not know who first set a broken leg, or launched a seaworthy boat, or calculated the length of the year, or manoeuvred a field, but we know all about the killers and destroyers. People think a great deal of them, so much so that on all the highest pillars in the great cities of the world you will find the figure of a conqueror or a general or a soldier. And I think most people believed that the greatest countries are those that have beaten in battle the greatest number of other countries and ruled over them as conquerors.
People who are glorified often in history books are those

Options

A. who contributed to the public health.
B. who contributed to the technical knowledge of man.
C. who made calendars.
D. who fought and won wars.