The scale you are describing starts on D natural and has the following intervals between the notes:
- D to E: whole step
- E to F: half step
- F to G: whole step
- G to A: whole step
- A to B♭: half step
- B♭ to C: whole step
- C to D: whole step
This sequence of intervals corresponds to the D natural minor scale, which has the following pattern of whole and half steps: W-H-W-W-H-W-W.
Thus, the correct answer is:
minor