What are the challenges and obstacles of raising the legal drinking age to 25

Because there is a mix of underage and of age students on campuses, the alcohol flows rather freely. If the drinking age were to be raised to 25, most students on campus would be underage, and as some hope, it could curtail the excessive drinking and resulting negative consequences.

answer would be b, a tariffs main purpose is to protect domestic production and jobs.

can you give a picture of the map, i'll be able to update my answer!