Explain the territorial expansion of slavery from 1820s through the 1850s

Which are in millennium development goals check all that apply

Match the people with the appropriate description. vernon and irene castle arthur murray fred astaire willi ninja a. stylized the forms of ballroom dance by incorporating other dance forms b. responsible for renewing the influence of ballroom dance in america c. godfather of vogue danced. responsible for standardization/teaching of steps leading to spread of ballroom dance education

How did the actions of tsar nicholas 2 and his wife lead to revolution in russia