The researcher received an award for thepaper(A) thatexamined(B) climate-related migration trends, a topic that hadrarely(C) been addressed in previousliterature(D) which was mostly outdated.

Frasa "which was mostly outdated" seharusnya menerangkan "previous literature", bukan "paper". Tanpa koma, pembaca bisa bingung apakah "which" menerangkan "paper" atau "literature", sehingga perlu ditambahkan koma: "...literature, which was mostly outdated."Jawaban: D