Constitutional; a constitute lawyer would be just stating he is definitely a lawyer. Constitutionally would means in most phrases regards how constitutional it is.
Therefore Constitutional would be the correct answer.
I blame you (with a passive voice)
It's the noun of the app that I have used
George shoots Lennie and their dream is over, their plans have all came to nothing, just as the mouse's did
The title of a book, film, or play, and if on paper, you underline it