How would you write an hypothesis for Janice's experiment?

Janice wants to see which type of soap works best at killing bacteria. She is going to test three different kinds of
soap, Dial foaming hand soap, Dawn dish soap, and Dove body wash. She bought all three soaps at the local
supermarket. She will wash her hands in each type of soap for 20 seconds. Then she will 'stamp' her palm on an agar
plate (place to grow bacteria). She will let each plate incubate (grow bacteria) for three days. After three days she will
could how many bacteria colonies are on each plate.