Which of the following correctly orders dynamic markings from softest to loudest?

The options are not provided in the question. Please provide the options so that I can answer accordingly.

The correct order of dynamic markings from softest to loudest is as follows:

1. Pianissimo (pp)
2. Piano (p)
3. Mezzo piano (mp)
4. Mezzo forte (mf)
5. Forte (f)
6. Fortissimo (ff)

Please note that there are additional dynamic markings such as mezzo forte piano (mfp), crescendo, and decrescendo, among others. But in terms of the six standard dynamic markings, the given order represents the progression from softest to loudest.