Farmers might avoid leaching their land by a. planting the same crop over and over again b. planting cover crops that are left to die and act as a natural fertilizer c. digging out the topsoil and growing plants in the subsoil d. constructing windbreaks around the edges of their fields

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?