What is the method used to calculate the expansion rate of the universe?

I - The method calculates the expansion according to the most distant radiation that our experiments can see, known as the microwave background radiation.
II - The method uses information from supernovas to calculate the rate.
III - The method calculates the expansion rate based on the distance between stars and galaxies.
IV - The method calculates the expansion rate based on the radiation emitted by black holes.
a) I and II are correct.
b) II and III are correct.
c) III and IV are correct.
d) I and III are correct.