The poll doesn’t appear to suggest that we “won” anything on July 4, 1776, just “declared.” It does, however, ask from which country we won independence, which was an historical eventuality looking forward from that date.
The wording of the poll continues the misperception that we “won” something on July 4. People think that it was the end of the revolution and putting those signatures on the paper was just a matter of formalizing it, like buying a car. They don’t want us to remember that those signatures were an act of High Treason against the most powerful nation on Earth, because our current government thinks a retireee at a Tea Party is a radical bomb-thrower and the lapdog media is more than happy to continue that image, while Big Education downplays the true radicalism of the Founding Fathers.