Help please (20 pts) I think it's C What does "think of concrete examples" mean?

A. It means you come up with as many examples as you can in five minutes.

B. It means your thinking is getting too stiff, like concrete.

C. It means you think about how you can imagine the problem as a concrete block.

D. It means think of a real-life example you can relate to that has to do with what you’re learning.

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc