Suppose that you are running to catch a subway. You race past a large poster that shows various foods in uncharacteristic colors, such as an orange strawberry and a red carrot. However, you actually perceive a red strawberry and an orange carrot.

In Anne Treisman's theory, this phenomenon would be called:

a. overactive bottom-up processing.

b. attentional bias.

c. a Gestalt.

d. an illusory conjunction.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

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.