Help needed asap!! subject: world history

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

During world war ll, the untied states was a member of the allies axis european theater pacific theater

Which french colony used the french revolution as inspiration to gain its own independence? a. brazil b. nicaragua c. haiti d. honduras e. ecuador