Correct option is A
Stock allowances (A) are given to incentivize stores to try a new product (II).
Premiums (B) are offered to customers to incentivize them to increase their consumption of a product (IV).
Sampling (C) is a sales promotion method used to incentivize customers to try a new product (I).
Advertising (D) aims to create awareness and interest in a product, which can help incentivize stores to keep selling a product (III).
Therefore, the correct answer is option (a) where the matching of List I with List II is A- II, B- IV, C- I, D- III.