Truth be told, it could be two. A would make sense in that the way the sentence is worded, the turtle herself seems weak. while C is also true to the word dragging as that would make it's movements awkward and difficult. I'd say your best bet would be C as turtles heavy backs and it's slowly speed would make the term "Dragging" make more sense.
Pretty sure that it is (A) NO CHANGE
I think you have to do this one on your own cause u most likely have the book don't b lazy ol' chap lol
