A force of 50 newtons is applied to two objects of different masses. The object with less mass will accelerate than the object with greater mass. A. inertia
B. friction
C. acceleration
D. faster
E. slower

My own answer is letter E

wavelength variability is the right one

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )