All of the following are duties of United States citizens EXCEPT: A. understanding their rights B. taking education seriously C. understanding what it means to be an active citizen D. learning about and understanding foreign governments and laws Please select the best answer from the choices provided A B C D

The rulers of the west african kingdoms expanded their lands by

Which best explains parallel forces?

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