Can some explain to me if C is the correct answer here

Question

anonymous · Answer

Recall what was previously explained. Anything outside the radical will be shifting your equation up, therefore you're left with a 50/50 shot.

howard-wolowitz · Answer

ohh well that makes sense dude, hmm I think itd be A because 7 was first on the question

anonymous · Answer

No, since 7 is outside the radical it would suggest that the equation is shifted up 7 units. Therefore your choices are B and D.

anonymous · Answer

And since anything within the radical will be opposite (i.e -5 would be shifted 5 units to the right), this would leave you with only one option: D.

howard-wolowitz · Answer

how you said it was postive?