What doe the phrase a "social experiment " mean

Why did the tokugawa shogunate close japan to foreign influence?

In order to maintain national security within its colonies in america, england constructed a series of forts along colonial boundaries for protection. true false

What initiatives were taken by americans to benefit the war effort? 1. americans planted home gardens to ration food for the troops. 2.american charities were established to provide aid to factory workers. 3.american companies joined together to make products more cheaply. 4.americans created clubs for promoting weapons to be used in the war.