A. The south pole of one magnet is near the south pole of the other magnet.
Explanation:
Like poles repel.
Unlike poles attract.
Thus:
A should repel each other. (S and S together)
B might not be able to have enough attraction between both magnets to move towards each other so they remain still.
C should attract each other. (N and S together)
D might not be able to have enough repelling power between both magnets to repel each other so they remain still.
Overall, B and D would not have any attraction between each other so they are neutral. C is wrong because they have the strongest attraction while A has the strongest repelling in that situation.
Blue light waves have only roughly half the wavelength of red light waves, and the so-called "microwaves" are the radio waves with the shortest wavelengths.
