Some analysts have attributed the success and quick diffusion of the apple ipod in part to the white earbuds. at the time, earbuds were not seen as often, and most headphones were black, not white. as knowledge of the ipod spread, the white earbuds could be seen even if the ipod itself was out of sight. this is an example of which of the factors that affect speed of diffusion?

Observability

Explanation:

In this question, the factor affecting the velocity of diffusion is observability.

This mathematical concept concerns the knowledge of an internal state of a system by the knowledge of its external outputs. (such as the white phone that determined the use of the ipad even when it could not be observed)

The dissemination occurred through the innovation of the brand and creation with consumers about the relative advantages of the brand and the diffusion of a symbolism that induces the use of a product by fad and added value.

the answer is either c or b, i cant be to sure tho.