Answer:
These statements are true:
B. European empires expanded as a result of transoceanic voyages of exploration and establishment of colonies
The age of discovery started with the Portuguese, who established colonies in Africa and Asia. The Spanish followed soon and colonized most of South and Central America. In the following decades, the French, Dutch and Swedish did the same.
Therefore, interoceanic voyage was interlinked with colonization. As European nations discovered new lands, they took hold of those areas, subjected the local populations, extracted natural resources, and annexed the new colonies to their growing empires.
D. The French Empire became even larger than the British one due to France's early successes in gaining territory in Asia and America.
During the earlier phases of European Imperialism, the French were more succesful than the English, at least, in amount of territory held. In the Americas, the French ruled a large area from Quebec to New Orleans, although not many french colonizers lived there.
The English focused on the Eastern Colonies, that were smaller in land area, but larger in population.
In June 1914 a Serbian-nationalist terrorist group called the Black Hand sent groups to assassinate the Archduke
D. Deborah proslavery men from Missouri to go and then return home
The philosophy of Karl Marx was not used to justify European Imperialism whereas European superiority allowed other races to be seen as sub-human, as did social Darwinism as there were theories produced to suggest the white race was genetically superior (where the term Caucasian came from).