Answer: D. Restrictions on travel into and out of affected areas.
Explanation:
Restrictions on travel in and out of affected areas can lead to Scarcity in a Pandemic because there is no free movement of labour and capital.
With borders shut down, goods that were normally imported will suddenly become very hard to acquire because getting them through travel bans is very hard and in most cases, impossible.
Also affected are services as, for instance, the people who provided such services might live in or come from the place they provide said service to. Getting into those areas might prove too cumbersome a task thereby limiting Service provision.
Looking at the current Corona Virus Pandemic that has seen the most extensive Travel Restrictions by Countries in recent times and looking at the Scarcity being suffered by those same countries, drawing the conclusion that the Scarcity is as a result of an impediment to free movement of Goods and Services is most logical.
