Spike Inc. is a sportswear manufacturer that recently launched its new line of customizable running shoes. The shoes come with a digital component that allows them to adapt to the runner's biomechanics. To promote this new product, Spike launches an advertising campaign and also ropes in a famous athlete to endorse the product. This is an example of a ________.
A) trade promotion
B) reverse flow
C) push strategy
D) pull strategy
E) backward flow
Answer: D