Please help quick.

After considering options, a student using the problem-solving process should next

Migrant workers who fill employment needs in their host country often send remittances to their home countries

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?