What Happened to All of the Quarks That Existed Freely

question 105

Multiple Choice

What happened to all of the quarks that existed freely during the particle era?

• A) They combined in groups to make protons, neutrons, and their antiparticles.
• B) They froze out of the soup of particles at the end of the era.
• C) They evaporated.
• D) They combined in groups to make electrons and neutrinos.

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