Research Papers / Death penalty Research Paper - to make it informative or argumentative? [3]

Hello,
Im in English 111 and my professor wants a research paper on a topic that we feel comfortable writing about. I choose the death penalty thinking it was going to be easy. But I have to choose to make it informative or argumentative. I choose informative but he said it was going to be harder than argumentative. I thought informative is just facts therefore easier. Im confused. Can anyone help me? It cant have any religion based argument in it either.