Specialization can help a country's economy by:* A) increasing its overall opportunity costs.
B)reducing the level of division in its labor force
C)increasing the cost of its voluntary exchanges
D)reducing its need to be self-sufficient,

D)reducing its need to be self-sufficient,

Explanation:

Specialisation by a country's economy means that it produces only the specialised goods & even export it, import the other goods.

It decreases opportunity costs, decreases cost of voluntary exchanges. Higher level of specialisation implies there is increased labor force division.

However, it reduces need of country to be self sufficient. As, it can gainfully trade its specialised goods for other goods (in which other economy specialises).

the page presents four different kinds of threats that volcanoes pose and what to do before, during, and after an eruption.

the investment was $14,174.196

explanation:

a lump sum means that the father of the example made one deposit and leave it be.

we need to know the value of a capital that generated at 4.05% per year during 28 years the sum of $48,613.24

now clearing the formula to solve for capital we got:

and we reach the answer investment = $14,174.20