B. it does not directly pertain to the gathered notes
Explanation:
If your statement is engaging or attention grabbing might be up to debate, but a thesis will not make any sense if it's not supported by the rest of the text and the support usually comes from the notes that you gathered about the subject. If those are not connected to the thesis, there's clearly something wrong.
because there were people who didn’t want the immigrants to “pollute“ the land, and wanted the country to be all-white. people didn’t want other races to be made citizens.