The correct ordering of dynamic markings from softest to loudest is:
pianissimo, piano, mezzo-piano, mezzo-forte, forte, fortissimo
However, since that specific order is not one of the given responses, the closest, and a correct interpretation from the provided options would be:
pianissimo, piano, forte, fortissimo
If we consider that option as it includes the dynamics in a comparative form from softest to loudest (even though mezzo-piano and mezzo-forte are missing).
If you can choose from the given options, the closest one that represents increasing loudness is:
pianissimo, piano, fortissimo, forte
Please let me know if you have more options or need further clarification!