Answer:
e. Pertaining to a national (or group) policy of non-interaction with other nations (or groups).
Step-by-step explanation:
Isolationist is a strategic approach pertaining to a national (or group) policy of non-interaction with other nations (or groups). This ultimately implies that, an isolationist refers to a country that has a diplomatic policy of non-interaction or avoiding to have any form of alliance with other countries.
Generally, countries choose to practice isolationism because they want to avoid foreign economic commitments, preserve her identity and culture, protect its territory, etc. Between 1641 to 1853, The Tokugawa shogunate of Japan adopted isolationism known as "Kaikin" which made it avoid contact or alliance with other countries. Also, in 1930 China was isolationist by banning all maritime shipping activities.