Money received for doing a job or performing a task

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

Need it now explain gorbachev’s policy of glasnost. how did this policy change the soviet union?

The u.s. constitution outlawed slavery. true false