Which statements were a factor in the decline of Sumer? Select all correct answers.

A. Salinization of the soil occurred.

B. A drought caused poor crop production.

C. The cultivated soil had poor drainage.

D. Nomads invaded Sumerian city-states.

d.summerains, the last one

in the declaration of independence, thomas jefferson announced that every human being has “certain unalienable rights,” among which are those to “life, liberty, and the pursuit of " hope i

what are the choices?

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years