Which cause were the most significant cause of World War One. and why?

c. free trade can lead to low pay for workers in poorer countries.

so, based on the research i've done. the u.s. government were always on a wild goose chase just to take down castro. he then retired his trone to his brother raul in 2008 due to some health issues. so it's obvious your answer would be:

castro had no allies from which he could receive aid.

hope this and have a fantastic day!

                                                    -wolfiewolffromsketch

estoy bastante seguro de que la respuesta es una