Answer: laissez-faire economic policy
Step-by-step explanation:
membership in the League of Nations - Does not apply, Coolidge chose to interfear with the leauge of nations and chose to stay out of it.
laissez-faire economic policy - Coolidge prefered the fedral governemnt to be laissez-faire and to not interfear with the markets.
Teapot Dome scandal - President Warren G Hardings administration was involved, not Coolidge
Emergency Quota Act - President Warren G Harding signed this act into effect, not Coolidge. so it does not apply