You read $$What Business Are You In$?,$ which discussed Theodore Levitt$$s revolutionary marketing ideas. Which of the following best represents a key principle that Levitt recommends?

$($Please select one$)$

Businesses should focus on what goal customers want to accomplish instead of focusing on the specific products$/$services consumers seek out to achieve the goal.

Organizations should be vague about what benefit their products$/$services offer in order to stay somewhat mysterious.

Companies should regularly change what business they are in to keep up with the market.

Firms should strive to specialize in one particular type of product so that it is crystal clear to consumers what business the company is in and has in$-$depth expertise in$.$