It's the second one that's correct...
Its A or D hope this helps
I believe the answer is D. Great Britain.
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Industrialization spread from </span>Britain<span> to other </span>European<span> countries, including Belgium, France and Germany, and to the United States. By the mid-19th century, industrialization was well-established throughout the western part of Europe and America's northeastern region.
Hope this helped.</span>
After the Soviets successfully detonated an atomic bomb in 1949, President Harry S. Truman ordered the creation of a hydrogen bomb project. With the help of the Polish mathematician Stanislaw Ulam, Dr. Teller developed a model for the hydrogen bomb known as the Teller-Ulam design
Generally speaking, it was difficult for American ground forces to clear areas of guerrillas because "The guerrillas hid themselves from American forces" and "<span>The guerrillas fled while the ground forces were in their area". </span>