Not Answered 13.Not Answered 14.Not Answered 15.Not Answered 16.Not Answered 17.Not Answered 18.Not Answered 19.Not Answered 20.Not Answered Question Workspace Which of the following is correct? Since 1950, a. U.S. exports and U.S. imports each have increased significantly. b. U.S. exports have increased only slightly and U.S. imports have increased significantly. c. U.S. exports have decreased and U.S. imports have increased. d. U.S. exports and U.S. imports each have increased slightly