Schaie's cross-sequential research on intellectual development studied

The research on cross- sequential shows that there is a change of the intellectual capacity of humans when they reach a certain age. This shows that when people reach adulthood, their mental abilities improve. But, this intelligence tends to gradually decline later in life.  

answer:   c.

it was not against the chinese government.

explanation:

according to classical republican political theory, which democratic republics would function best?

a.   small republics, with people who had similar interests

b.   large republics, with people who had competing interests

c.   republics made up entirely of landowners

d.   republics made up entirely of servants