Which event led france and britain to declare war on germany in 1939?
a. hitler's invasion of austria
b. hitler's attempt to annex the czechoslovakian sudetenland
c. hitler's invasion of poland
d. hitler's attempt to annex western russia

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

Which communities brought about the rise of the first politician? a.anthropological b.neolithic c.hominids d.geologist

Acivilization reaches its high point during its stage. a)birth b)growing pains c)adulthood d)senior