Which sentence best expresses the central argument of president barack obama's back to school speech?

It is your responsibility to work hard for yourself and the United States.

B. it is your responsibility to yourself and the United States to work hard in school

just took quiz <3

in the 1890s, southern states enacted a new form of black codes, called “jim crow” laws. these laws made it illegal for blacks and whites to share public facilities. this meant that blacks and whites had to use separate schools, hospitals, libraries, restaurants, hotels, bathrooms, and drinking fountains.

explanation: