Congratulations! You are correct!
4.
A. If you go down to the river late at night you can find, craw dads.
B. If you go down, to the river late at night you can find craw dads.
C. If you go, down to the river late at night you can find craw dads.
D. If you go down to the river late at night, you can find craw dads.