Answer: Brand manager
Step-by-step explanation:
From the question, we are informed that Oscar is a manager at IceCold Foods, and that he is responsible for the firm's S'Cream brand of ice cream and he recently approved a proposal to test market new ice cream flavors and also considering the possibility of lowering the price of the ice cream and initiating a new advertising campaign.
Based on the above scenario, Oscar is a brand manager. A brand manager is in charge of promoting a brand and also running different campaign and advertisement to ensure that the brand is exciting and up to date.