10. What do companies do to try to market to teenagers? A Place newspaper ads for their products
B try to establish their brand as "cool"
C place their product on the bottom shelf in the grocery store
D use musicians from the 1960s in their commercials

the answer is B. try to establish their brand as cool

The answer is B they want to make it seem “cool” to the teens

The answer is . They make it easier to travel  internationally without trade barriers

Trade barriers affected imported products, not traveling citizens.

It determine how much tax that would be imposed on the products and it will highly affect the products' price when they get in the country