Maybe it’s just me, but I really don’t find the question to the point.
From what’s the correct set of answers, I’d suggest to change the question to Which of the following are options to get the markup of element nodes?, although I don’t find the question appropriate/good at all. It’s not about the elements’s value, and even when changing it to “markup” it is vague.
I think what’s more confusing than the name of what you are asking for in the question is that it reads as if there are two answers that are equal (in that they produce the same result etc.).
I read the question like Which of the following are options to get THE value of element nodes?. someElement.innerHTML and someElement.outerHTML don’t return the same, though.
But that’s just me being a super-nitpicker here. 🙂