Answer:
It enabled individuals and businesses to communicate on a broader scale.
Explanation:
The United States began sending large numbers of military advisers to South Vietnam after "<span> Lyndon Johnson escalated the war with air strikes," since by now it was clear that the US wanted to withdraw as many military personal as possible. </span>
Answer: A. True
Explanation: Despite policies of toleration and use of Chinese in the government of Kublai Khan, the Mongols did not want to become Chinese, they kept separate from the Chinese they ruled clinging to their own culture and values, celebrating their traditional festivals and enjoying their feasts. In the system of tax collection the people did not pay to local collectors but to a central system.
The best option from the list would be "<span>b. the California Gold Rush of 1849 Eliminate" since this is the event that drew thousands of people to the west, thus occupying the US from coast to coast. </span>
The submarine became a potentially viable weapon with the development of the Whitehead torpedo, designed in 1866 by British engineer Robert Whitehead, the first practical self-propelled or 'locomotive' torpedo.[20] The spar torpedo that had been developed earlier by the Confederate States Navy was considered to be impracticable, as it was believed to have sunk both its intended target, and probably H. L. Hunley, the submarine that deployed it. In 1878, John Philip Holland demonstrated the Holland I prototype.
Discussions between the English clergyman and inventor George Garrett and the Swedish industrialist Thorsten Nordenfelt led to the first practical steam-powered submarines, armed with torpedoes and ready for military use. The first was Nordenfelt I, a 56-tonne, 19.5-metre (64 ft) vessel similar to Garrett's ill-fated Resurgam (1879), with a range of 240 kilometres (130 nmi; 150 mi), armed with a single torpedo, in 1885.
A reliable means of propulsion for the submerged vessel was only made possible in the 1880s with the advent of the necessary electric battery technology. The first electrically powered boats were built by Isaac Peral y Caballero in Spain (who built Peral), Dupuy de Lôme (who built Gymnote) and Gustave Zédé (who built Sirène) in France, and James Franklin Waddington (who built Porpoise) in England.[21] Peral's design featured torpedoes and other systems that later became standard in submarines.[22][23]