Why do these bureaucrats have great influence on legislation and decision making?

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

Why did roosevelt support a europe first strategy even though it had been japan that had first attacked the us

(05.04 mc) how did the roman transportation system keep the empire strong? plz