Which of the Following Statements Best Describes the Number of Signed

Which of the following statements best describes the number of signed opinions issued by the Supreme Court each term in the twentieth century?

A) They have increased dramatically since the early 1950s.
B) They have hovered around 150 cases since the mid-1980s.
C) They have remained constant since the Civil War.
D) They dwindled notably since the 1980s.
E) They have fallen 50 percent since Barack Obama became president.