The description that should appear where you see the question mark is:
OB. became president of Argentina
Explanation:
1. Simón Bolivar and José de San Martin were two important figures in the fight for independence in South America.
2. Simón Bolivar was a military leader and revolutionary who fought in northern South America, while José de San Martin fought in southern South America.
3. Both of them played crucial roles in defeating the Spanish armies in battle and contributing to the liberation of South American countries.
4. Simón Bolivar, after the successful military campaigns, became the president of several new republics in South America, such as Gran Colombia.
5. José de San Martin, on the other hand, was not the president of Argentina. He played a significant role in Argentina's independence but did not hold the position of president.
Therefore, based on the information provided in the text, the most fitting description for the question mark is that Simón Bolivar became president of many new republics, not specifically of Argentina.
