This problem is a disguised function problem. The testmakers want you to see that asterisk and freak out because you've never studied anything with an asterisk in it before and clearly can't be expected to do this one. But here's the trick: don't freak out. Nobody else has studied this asterisk thing either, because the testmakers just made it up! But they will always give you instructions. You just need to follow the instructions. Let's try this one.
What they're telling us is that when you see the asterisk, take the thing under it and divide 2 by it. Fair enough. If you look under Quantity B, we see (x*)*. It's nested! Just follow PEMDAS and do the function inside the parenthesis first. So for x*, we've been shown that it's 2/x. Great. But now we have (2/x)*. This just means do it again. Take the 2/x and divide 2 by it. What we get is 2/2/x, which doesn't look great when typed that way, but you know what I mean.
How to simplify a threelevel fraction? Back up. We have 2 divided by 2/x. We can pretend the first 2 is also a fraction and call it 2/1. So now we have 2/12/x. Now we have a fourlevel fraction! We made it worse! Not really though.
If you have a fourlevel fraction, just flip the bottom fraction and then multiply it by the top fraction, so 2/12/x should become 2/1 times x/2. This is easier to write on a whiteboard than in a text editor, but you should see that the 2s cancel out and we're left with just x. So the answer is C.
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