What Happened to All of the Quarks That Existed Freely

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 evaporated.
C) They froze out of the soup of particles at the end of the era.
D) They combined in groups to make electrons and neutrinos.