All of the Following Statements Concerning the Filibuster Are Correct

All of the following statements concerning the filibuster are correct except

A) it became a common feature of Senate life by the end of the nineteenth century.
B) it became an unpopular feature of Senate life by the end of the nineteenth century.
C) it was used by liberals and conservatives alike.
D) there have been attempts to restrict its use.
E) today, it takes seventy-five senators to end debate.