Answer:
1. The underlying principle is
to create the best-educated workforce in the world.
2. The argument that uses the same underlying principle as the argument 1 above is:
b. Children should get free dental care because it will help prevent more serious issues later on and reduces future healthcare costs.
Step-by-step explanation:
The underlying principle is a general rule which can be applied to different situations. It shows the reason for doing something or embarking on a program. For example, to offer free college education for every U.S. citizen, the underlying principle is to "create the best-educated workforce in the world."