How did the trading empires of mali and songhai overcome the geographic challenges of africa? -by building a large network of roads -by digging irrigation canals -by domesticating camels -by perfecting navigation techniques

answer is x. lo xd

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.