What scale(s) would I use to improvise over this riff?

1. How to use Scales in jazz improvisation?

How to use Scales in jazz improvisation?

The Seven Modes Derived from the Diatonic Scale

1. Ionian: Starts on the first note – C.
2. Dorian: Starts on the second note – D.
3. Phrygian: Starts on the third note – E.
4. Lydian: Starts on the fourth note – F.
5. Mixolydian: Starts on the fifth note – G.
6. Aeolian: Starts on the sixth note – A.
7. Locrian: Starts on the seventh note – B.