Answer:
d. premium pricing.
Step-by-step explanation:
Premium pricing is the strategy of pricing in which the product is highly priced in comparison to that of the other similar products available in the market. This is done in order to keep the belief in customers that the product is superior than those available in the market.
Some people those who think that expensive products are always nice, prefer these kind of products.
Here in the given instance also Sherry prefers this model and her ideology also matches with this technique.