Complete the following sentence: many linguists agree language developed in two stages, begginning with
a. greetings
b. noises and gestures for danger
c. symbols or drawings of food
d."sentences" of noises making up something meaningful

Which of the following describes an effect of world war ll on the united states economy a. automobile companies produced a record number of cars b. many factories had to expand to produce military equipment c. the airplane industry suffered as the allies began using airplanes in combat d.cities with shipyards declined because so many ships had been sent overseas.