Answer:
The answer is concrete
Explanation:
Ancient Roman concrete was a mixture of lime mortar, aggregate, pozzolana, water, and stones, and was stronger than previously-used concretes. The ancient builders placed these ingredients in wooden frames where they hardened and bonded to a facing of stones or (more frequently) bricks.
One of the changes to Arkansas economy that could have lessened the effects of the Great Depression and hastened the state's recovery would have been that of diversifying its sources of income. Arkansas relied mostly on agricultural production, and besides this, its industries were extremely limited. This meant that the state was greatly affected by the low crop prices of this time period. It also meant that the many floods and droughts of the time severely affected the economy. However, if agriculture had not been the only major economic enterprise of the state, the effect would have been lessened.
The answer is D. Contrasts with the Soviet Union developed and in 1959 they moved toward becoming rivals in the global framework offering two unique models of socialism. China was seen by progressive US presidents from Dwight Eisenhower to Lyndon Johnson as a feature of the more extensive 'communist threat'; a view fortified by China's procurement of atomic weapons in 1964. China's contribution in the Korean War (1950– 1953) set Chinese troops specifically against US powers and their partners, bringing about a stalemate that kept on isolating North and South Korea well into the twenty-first century.
C.
<span>American troops finally withdrew.</span>
