According to the demand-pull theory of inflation, what is responsible for inflation?

producers increase production to meet existing demand.
consumers have too little money to spend.
prices tend to rise if businesses cannot produce the quantity demanded by consumers.
the supply of goods causes prices to drop.

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.