Question: Open a modern quartz movement watch to replace the battery.

  Options: 
 A. Place the watch face down on a soft surface. Look to see the back is a screw on or a push on. Unscrew a screw on with the appropriate tool. Use a small screw driver to pry the push on type off. Put the new battery in place and reassemble.
 B. Place the watch face down on a soft surface. Look to see the back is a screw on or a push on. Unscrew a screw on with the appropriate tool. Use a finger nail to pry the push on type off. Put the new battery in place and reassemble.
Answer: A