单选题 Although economists have traditionally considered the district to be solely an agricultural one, the ______ of the inhabitants' occupations makes such a classification obsolete.
【正确答案】 B
【答案解析】(diversity多样性，差异性)。句意为：尽管经济学家们有把该地区只看作是农业区的传统，但是居民们职业的多样性使这一分类显得过时。A．productivity生产力；C． predictability可预言性；D．stability稳定性。