Because job specialization gave city residents more leisure time, residents had more time to devote to developments such as
a.
agriculture
b.
education and the arts
c.
irrigation
d.
manufacturing

Job specialization is the focus and refinement of a certain area of expertise at work. On the one hand, job specialization can make workers less flexible to perform other types of jobs, but it reduces training time, as workers focus on a certain set of operations and actions during work. It also increases leisure time, because after mastered skills for a particular specialized type of work, they do not have the need to learn some other skills and work operations. They can spend that leisure time on personal education or enjoying art, etc.

The answer is: B.

the  equal rights amendment  (era) states: "equality  of  rights  under the law shall not be denied or abridged by the united states or by any state on account of sex." congress first introduced the era in 1923, but the campaign for ratification took off in the 1960s during the  civil rightsmovement.