Which of the following is the most accurate statement?

a) Americans are very willing to buy domestically produced goods, even if there are more expensive than imported goods.

b) We import more foreign goods than we did 40 years ago, but the merchandise imports are still about the same percentage of our GDP.

c) In the decades following World War II, the Japenese consumer has strongly favored domestically manufactured goods over imports.

d) America has maintained its technological lead.