Which of the following is true regarding the flagstick?
A. While a player’s ball is in motion, they may have the flagstick removed if they think the ball with strike it.
B. A player must remove the flagstick when playing from the putting green
C. A player may not have the flagstick attended when playing from off the putting green
D. A player can leave the flagstick in when playing from the putting green. (new in 2019)