Question

Which one of the following statements concerning the standardcosmological model is false?


a.
About 0.5 million years after the Big Bang, hydrogen and heliumatoms began to form.

b.
The first distinguishable particles in existence after the Big Bangwere quarks and leptons.

c.
Shortly after the Big Bang, all of the fundamental forces behavedas a single force.

d.
The Grand Unified Theory describes the universe immediately beforeand shortly after the Big Bang.

e.
At 10–43 s after the Big Bang, the gravitational force wasdistinguishable from the other fundamental forces.