Why can't it say, "What prize is the biggest?"
Duo not withstanding, "Which prize is (the) biggest?" is correct in English (and clearly closer to the Vietnamese structure).
'Which prize is biggest', is 100% correct.
Why wrong , What is the biggest award
Giải thưởng Nobel
bạn nói tiếng việt họ không hiểu gì đâu
"which prize is biggest" was marked wrong.
I think it should be added as a correct translation.