Based on everything we talked about this semester, which one of the following DOESN'T FIT the concept of marketing as a discipline?

Marketing cannot exist without a customer

Segmentation is an important way to select your key target audience

Marketing strategies are an important step in the marketing planning process

Age preferences in social media don't matter, all platforms reach the intended target

$$ The $4(5)$ P$\text{'}$s are the key concept in marketing