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An inventor trying to build a better roller skate came up with what breakthrough in transportation technology? 1) The rubber wheel. 2) The quick-release binding. 3) Steel ball bearings. 4) The internal
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An inventor trying to build a better roller skate came up with what breakthrough in transportation technology? 1) The rubber wheel. 2) The quick-release binding. 3) Steel ball bearings. 4) The internal combustion engine.

User Emillie
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Options C is correct
User Chansuk
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