Which of the following is considered a macroeconomic issue?

$$ A$)$ The pricing strategy of a firm

$$ B$)$ National unemployment rates

$$ C$)$ The market structure of the tech industry

$$ D$)$ Consumer behavior in a supermarket

Don't use chatgpt or other ai tool. If you know correct answer then attempt if you gave wrong answer I will give

$10$

$$dislikes and more from my friendsaccount