Question

Which policy most likely helped reduce the incidence of retailers selling alcohol to minors?

increasing the price of beer
reducing excise tax on soda
raising the legal drinking age
using compliance checks

Answer 1

Using compliance checks.

Rationale: compliance checks (undercover purchases, citations/penalties for illegal sales) directly deter and reduce retailers' willingness to sell alcohol to minors by increasing detection and punishment. Increasing beer prices or changing soda tax don't target retailer behavior; raising the drinking age changes legality but won’t by itself enforce retailer compliance.