[EternalLight]

I understand what you're getting at, but that's not the case in this question, since one of the four answers are stated almost word for word in the text. (caution point 4)

The rest of the alternatives are "plausible guesses" which you might think are reasonable if you don't remember the point above. So what they're REALLY testing is if you read the text carefully enough to remember that line or not.

Actually having knowledge of microscopes are probably a bad thing on this particular question since you're likely to skip over the boring warning part, like I did when I quickly read the question just now.