[GVIrish]

That's not the point. The test giver has free discretion to say either answer is correct or incorrect. You could argue that if the intent was to underline "word" that it would have quotes around it, but it doesn't matter because the test is not supposed to be fair or consistent.

Things like this were at the heart of what Jim Crow was in America. Selective and capricious enforcement of the law to disenfranchise and disadvantage black people at best, enable unaccountable violence against them at the worst.

[Izkata]

That's a different argument than what started this thread. Cheating administrators have nothing to do with whether that question is ambiguous or not.

[ImPostingOnHN]

It's not cheating administrators, it's ambiguous questions with multiple possible answers.

As the judge of this test, I interpret your answer as incorrect. I expected the phrase, "the last word in this line" to be underlined. Test failed, no cheating required.

(Note that had you underlined the phrase, "the last word in this line", I would have still judged it incorrect, claiming that "word" or "line" should be underlined. Again, this requires no cheating.)