What text in the paragraph on the previous page states an opinion or something that could not be proven by research?

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal

What type of monarch was fredrick the great ?

How did the love and black elite gain financial security during the antebellum period