During the age of Islamic expansion (7th and 8th centuries), urban areas began to grow in converted areas because A) mosques were found only in cities
B) converts often moved to cities to learn Islam
C) the Qur'an says that people should live in cities

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

mint more silver currency sorry its probably to late.

d definitly is not

the answer is b. hope this .