Which One of the Following Statements Concerning the Standard Cosmological

Multiple Choice

Which one of the following statements concerning the standard cosmological model is false?

A) Shortly after the Big Bang, all of the fundamental forces behaved as a single force.
B) About 0.5 million years after the Big Bang, hydrogen and helium atoms began to form.
C) The first distinguishable particles in existence after the Big Bang were quarks and leptons.
D) The Grand Unified Theory describes the universe immediately before and shortly after the Big Bang.
E) At 10^-43 s after the Big Bang, the gravitational force was distinguishable from the other fundamental forces.