W is the softest of the four substances tested. W is the hardest of the four substances tested. W can scratch Y. W can scratch X.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Some students are performing hardness tests on several substances. X scratches Y. Y scratches Z. Z scratches W. Which of these statements best describes substance W's hardness?
Possibilities:
- W is the softest of the four substances tested.
- W is the hardest of the four substances tested.
- W can scratch Y.
- W can scratch X.

W is the softest of the four substances tested.