At the end of the Yellow Brick Road, Dorothy comes across
The Wicked Witch of the West! Dorothy threw water on the Wicked
Witch, causing her to melt! If Dorothy threw 9 Gallons on the Wicked
Witch, and there was still 3.5 Gallons left in the bucket, how many Gallons
were actually thrown on the Wicked Witch?

A) 6 Gallons

B)5.2 Gallons

C) 4 Gallons

D) 5.5 Gallons