What development most contributed to the success of the economy under Caesar Augustus?

mail service
improved industry
the construction of domes
the restoration of buildings

Why do countries create guidelines and laws on how a country is going to be run?

Which of the following statements about this graph is accurate? world grain production has increased in every year since 1950. the amount of grain grown between 1950 and 1980 decreased. world grain production has generally increased between 1950 and 2010. more grain was grown in 1950 than in any other year.

Which president created the cabinet? when?