In 1974 the number of people employed in the u. s. steel industry was 521,000. by 2006 the total number of people employed had dropped to 156,000. which of the following was a major contributing factor in the decreased employment and income in steel manufacturing?
(a) increased tariffs on imported steel led to less foreign competition.
(b) decreasing productivity per worker led to a decrease in labor demanded.
(c) the growth of high paying jobs in the service industry decreased steel wages.
(d) more processes were automated due to improvements in technology.

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the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.