The Policies That Different Governments Use to Govern Their Economies

The policies that different governments use to govern their economies:

A) have largely stayed the same over time, making international trade a simple process.
B) vary widely from one another, sometimes making international trade a difficult process.
C) are largely similar, making international trade a simple process.
D) are similar in most respects, but different in a few key areas, making international trade a somewhat difficult process.