Which of the following would NOT be considered capital?

What group addressed the issue of slavery in the election of 1848 by opposing slavery in new territiories

What is found within a ranger tower overlooking a drained lake

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)