With what country was the clayton-bulwer treaty signed?

What were the 2 main reasons why the chinese came to america ?

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

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?