LOL.
That route combination is older than the sh*t stains in butch davis' shorts.
It was a basic staple in the offense we ran in college, so i know how the QB is coached on that play, and I understand exactly what TVD is doing here. and the result of him hitting the wheel is that he threw to the correct receiver based on the coverage.
It absolutely is a three read progression, just as roman described. so unless when you were a QB in college running that play and you were coached differently than i was, i suggest you just might want to let the grownups take this one from here.