A、in the subtropical swamps of central Florida
B、in the wetland meadows of eastern Michigan
C、along the inland waterways of North Carolina.
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试题解析
作者在文章第二段最后一句指出,“It has moved steadily westward and is now found in all states but Florida”,因此A项不正确;根据文章表述,B、C两项均是“purple loosestrife”容易繁殖的地方,因此选择B和C。