What events contributed to the cultural and economic decline of the Arab world in 15th century?

a and c?

i think it is a and c

d) a constitutional amendment

cherokee and arikara

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.