What evidence might scientists have used to discover that homo erectus was able to make fires?

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.

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)

im going to go with b.