Which abbasid leader encouraged the arts and scholarship, and ruled from 786 to 809?

harun al-rashid

ibn sina

ibn khaldun

al'khwarizmi

Ineed an answer asap. which is not a reason for the “era of good feeling”? a) economy in the us was booming. b) the united states was victorious in the war of 1812. c) the united states outlawed slavery. d) the federalist party was disbanded and the united states had one political party.