What startling conclusion did American scientists make after scientists make after B-29 detected radiation in air over Alaska?
A) Alaska is huge

B) Soviet Union tested an atomic bomb

C) The Soviets were spying on us

D) There was once a land bridge connecting Alaska to Russia

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.

they remained in rural areas and worked at jobs such as lumbering or farming.

china is shifting toward specialization in industry and services and away from agriculture.

explanation:

mark brainliest

the growing interconnectedness of the world through communication, trade, and the exchange of ideas is an important theme in the history of the 20th and 21st centuries.

explanation: