Goods that are both excludable and rival are referred to as _____

Refer to the figure above. What is the producer surplus after Lithasia opens up to free trade?

A) $2 B) $3 C) $6 D) $9

The labor force excludes those:

A. younger than age 16 years old. B. who don't want to work. C. who are disabled and can't work. D. The labor force excludes all of these.