*The Silk Road is patrolled and protected by skilled nomadic warriors

*Local governments allowed to rule as long as tribute is paid

*Technology is spread through trade and the forced movement of experts

These were characteristics that can best be attributed to the

a
Golden Age of Tang and Song Dynasties
b
Pax Mongolia
c
Pax Romana
d
Golden Age of the Gupta Dynasty

Incomes of u.s. households in the 1970s and 1980s a. grew rapidly, due to the widespread success of labor unions in pushing up wages during those decades. b. grew rapidly, due to several increases in the minimum wage during those decades. c. grew rapidly, due to government policies that discourage the importation of foreign products during those decades. d. grew slowly, due to slow growth of the output of goods and services per hour of u.s. workers' time during those decades.