A few people witness an assault. Before the police arrive, one witness confidently tells the others that the assailant was wearing a green shirt, though in fact the shirt was blue. Later, when the police interview each witness individually, almost all of them state that they remember a green shirt. The memory error is referred to as

the misinformation effect

Explanation:

a) which ethnic groups live in this community?

i just took test

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.