Answer:
D. text contrast is mismatched
Explanation:
Very strong contrasts, and even the +ve contrasts, can put pressure on your eyes and stop you from reading through, as well as accentuate the visual tiredness. And keep in mind, when the contrast is very high then it might give you a feel, that your text is shaking or something like as if it is moving. And this condition is called "Irien syndrome" or "scotopic sensitivity syndrome" and these are common for all.
