How do third-party promotions circumvent the Robinson-Patman Act?
a. The Robinson-Patman Act was developed to help small retailers; third-party promotions don't affect small retailers.
b. The brand and the retail store don't exchange money; they both deal with the third party.
c. They don't; some brands have been sued for engaging in third-party promotions.
d. Promotion agencies did not work at a significant level when the Robinson-Patman Act was created, and thus were not taken into account during the creation of the law.