Which of the sentences below best expresses the essential information in the highlighted sentence in paragraph 3? Incorrect choices change the meaning in important ways or leave out essential information. A. In political history, northern kingdoms tried to extend their control during the twelfth century, but the south tapped into the rich treasures it had around the Mediterranean. B. Political history demonstrates that during the twelfth century, while southern states enjoyed the Mediterranean bonanza, northern countries increased the power of their kings. C. The political history of twelfth-century Europe shows particularly that northern countries continually tried to expand their rule into the south to profit from the riches there. D. Political history shows that northern kingdoms were so influenced by the example of Mediterranean wealth that they advanced into other areas.