A. Do they add the fragrance last thing, by mixing it so surfactants in the shampoo emulsify it?
This would cause lots of bubbles.
B. Do they premix fragrance with concentrated surfactants, then make the shampoo as usual?
This can cause some fragrance to evaporate by the time the shampoo is finished.
C. Premix the fragrance with some solubilizers/emulsifiers.
This looks like the best option, but I don't see solubilizers in the List Of Ingredients.
D. Some other?