Query about Question 12 from "(I'm Overwhelmed) Algebra Progress Quiz #2 (Version 2)" [7471]

GRE GRE Quant Problem Solving
1

https://www.gregmat.com/quizzes/quiz/im-overwhelmed-algebra-progress-quiz-2-version-2 (Question 12)

Hi! I was taking the Module 4 Part 2 quiz. Can someone please clear my doubt in the answer specifically third option.
Isn’t it only true for non-zero numbers? What if we put n=0 and m=0. Am I missing something?

Thanks in advance!

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Is it always true?

3

The question doesn’t state “always”. The inequation is true and false both.

4

If the question wants you to consider any case where the equation holds, it will use the word “could”.