Carlos set up three full vials beside one another and added drops to see the surface tensions of three different liquids. Which event could be a source of
error?
A. The air temperature varied when someone opened a window.
B. The liquids that spilled over the edges could mix on the table.
C. The vials were made of the same material,
D. The vials were different shapes.

D

Explanation:

just did it

a community that experiences major changes undergoes progress

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.