Physicists, using extremely sophisticated instruments, have documented that the component particles of atoms—protons, neutrons, and electrons—comprise many smaller units called hadrons that are themselves composed of quarks, particles whose radii are 2,000 times smaller than a proton.
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A
comprise many smaller units called hadrons that are themselves composed of quarks, particles whose radii are 2,000 times smaller than
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B
comprise many smaller units called hadrons, which are themselves composed of quarks, particles whose radii are 2,000 times smaller than that of
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C
comprise many smaller units called hadrons, and that they are themselves composed of quarks, particles whose radii are 2,000 times smaller than
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D
comprise many smaller units called hadrons, and that they are themselves composed of quarks, particles whose radii are 2,000 times smaller than that of
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E
comprise many smaller units called hadrons and they are themselves composed of quarks, particles whose radii are 2,000 times smaller than that of
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