Why does the author include these sentences in the article? "When Japan invaded China in 1937, it used 50,000 bike riding troops." "In World War II, British soldiers
were equipped with folding bikes." "In Sweden, soldiers used bikes for transportation until the 1980s."
to show the improvements in bicycles from the 1930s to the 1940s to the 1980s
to show that militaries from all over the world have used bicycles
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to compare the different ways that bicycles were used by these bike-riding soldiers
to explain how bikes are used in peacetime, as well as during wars