Which of the Following Statements Is Correct

Which of the following statements is correct?

A) According to the evidence from major industrial countries, there is no significant relationship between tax rates and the average number of hours worked per week.
B) In the early 1970s, the average French worker worked more hours per week than the average American worker; by the mid-1990s, the reverse was true.
C) Between the early 1970s and the mid-1990s, labor taxes in France decreased while labor taxes in the United States remained roughly constant.
D) All of the above are correct.