Which statement is in accordance with the steady state model of the universe?

a.

the universe always had and will always have the same density.

b.

the universe is formed with its own physical laws.

c.

a number of big bangs are followed by big crunches that reset the cycle.

d.

the universe will continuously expand, eventually resulting in the big rip.

e.

the nuclear fuel in the stars will eventually burn out, making the universe a cold and dark place.