3. Efficiency in the production possibilities model Suppose the United States produces only two goods : wheat and DVDs . The following graph shows the United States's current production possibilities curve , along with six output combinations represented by black points (plus symbols ) labelled A to F. 100 DVDS (Millions ) m 20 40 80 80 100 WHEAT (Millions of bushels) Complete the following table by indicating whether each point represents output combinations that are inefficient , efficient , attainable , or not attainable . Check all that apply