Which statement about sen. joseph mccarthy is true?
a.
he was awarded a special commendation by the senate for his anti-communist crusade.
b.
he was a decorated war hero who shot down many enemy planes during world war ii
c.
he succeeded in rooting out hundreds of communist spies in the federal government
d.
his baseless accusations destroyed the lives and careers of many innocent people

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