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.

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate